Sendstring LUT improvements (#5727)

* Align sendstring LUTs to 9 characters wide

* Replace 0 with XXXXXXX

* Use decimal 128 for LUT size

* Align heading comments

* Add ASCII table comments

* Add missing AltGr LUTs and adjust keycode LUTs accordingly

* Use pragma once

* Correct a couple more keycodes

* Capitalise "BÉPO"

* Also clean up the default tables

* Tidy up Belgian and Norman LUTs

10 files changed, 470 insertions, 269 deletions

diff --git a/quantum/keymap_extras/sendstring_belgian.h b/quantum/keymap_extras/sendstring_belgian.h
index 77531a14ab..f07d852722 100644
--- a/quantum/keymap_extras/sendstring_belgian.h
+++ b/quantum/keymap_extras/sendstring_belgian.h
@@ -13,13 +13,14 @@
  * You should have received a copy of the GNU General Public License
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
-/* Sendstring definitions for the belgian layout */
-#ifndef SENDSTRING_BELGIAN
-#define SENDSTRING_BELGIAN
+
+// Sendstring lookup tables for Belgian layouts
+
+#pragma once
 
 #include "keymap_belgian.h"
 
-const bool ascii_to_shift_lut[0x80] PROGMEM = {
+const bool ascii_to_shift_lut[128] PROGMEM = {
     0, 0, 0, 0, 0, 0, 0, 0,
     0, 0, 0, 0, 0, 0, 0, 0,
     0, 0, 0, 0, 0, 0, 0, 0,
@@ -38,7 +39,8 @@ const bool ascii_to_shift_lut[0x80] PROGMEM = {
     0, 0, 0, 0, 0, 0, 0, 0,
     0, 0, 0, 0, 0, 0, 0, 0
 };
-const bool ascii_to_altgr_lut[0x80] PROGMEM = {
+
+const bool ascii_to_altgr_lut[128] PROGMEM = {
     0, 0, 0, 0, 0, 0, 0, 0,
     0, 0, 0, 0, 0, 0, 0, 0,
     0, 0, 0, 0, 0, 0, 0, 0,
@@ -58,37 +60,38 @@ const bool ascii_to_altgr_lut[0x80] PROGMEM = {
     0, 0, 0, 1, 1, 1, 1, 0
 };
 
-// NOTE that you have to send the dead keys twice: tilda, circ
-// SEND_STRING(" !\"#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^^``_abcdefghijklmnopqrstuvwxyz{|}~~");
-const uint8_t ascii_to_keycode_lut[0x80] PROGMEM = {
-    0, 0, 0, 0, 0, 0, 0, 0,
-    KC_BSPC, KC_TAB, KC_ENT, 0, 0, 0, 0, 0,
-    0, 0, 0, 0, 0, 0, 0, 0,
-    0, 0, 0, KC_ESC, 0, 0, 0, 0,
- /* SPACE  !     "      #        $     %     &      '                 */
-    KC_SPC, BE_EXLM, BE_QUOT, BE_QUOT, BE_DLR,BE_UGRV,BE_AMP, BE_APOS ,
-  /*  (      )     *      +        ,        -        .       /        */
-    BE_LPRN, BE_RPRN, BE_DLR,BE_EQL, BE_COMM, BE_MINS, BE_SCLN, BE_COLN,
-  /*   0     1     2     3     4     5    6     7                     */
-    BE_AGRV, BE_AMP, BE_EACU, BE_QUOT, BE_APOS, BE_LPRN, BE_PARA, BE_EGRV,
-  /*   8     9      :       ;         <        =       >       ?      */
-    BE_EXLM, BE_CCED, BE_COLN, BE_SCLN, BE_LESS,    BE_EQL, BE_LESS, BE_COMM,
-  /*   @     A     B     C     D     E     F     G                    */
-    BE_EACU, BE_A, KC_B, KC_C, KC_D, KC_E, KC_F, KC_G,
-  /*   H     I     J     K     L     M     N     O                    */
-    KC_H, KC_I, KC_J, KC_K, KC_L, BE_M, KC_N, KC_O,
-  /*   P     Q     R     S     T     U     V     W                    */
-    KC_P, BE_Q, KC_R, KC_S, KC_T, KC_U, KC_V, BE_W,
-  /*   X     Y     Z      [         \       ]       ^      _          */
-    KC_X, KC_Y, BE_Z, BE_CIRC, BE_LESS, BE_DLR, BE_PARA, BE_MINS,
-  /*   `       a     b     c     d     e     f     g                  */
-    BE_MU, BE_A, KC_B, KC_C, KC_D, KC_E, KC_F, KC_G,
-  /*   h     i     j     k     l     m     n     o                    */
-    KC_H, KC_I, KC_J, KC_K, KC_L, BE_M, KC_N, KC_O,
-  /*    p    q     r     s     t     u     v     w                    */
-    KC_P, BE_Q, KC_R, KC_S, KC_T, KC_U, KC_V, BE_W,
-  /*    x    y     z      {        |        }        ~    DELETE      */
-    KC_X, KC_Y, BE_Z, BE_CCED, BE_AMP, BE_AGRV, BE_EQL, KC_DEL
-};
+const uint8_t ascii_to_keycode_lut[128] PROGMEM = {
+    // NUL   SOH      STX      ETX      EOT      ENQ      ACK      BEL
+    XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX,
+    // BS    TAB      LF       VT       FF       CR       SO       SI
+    KC_BSPC, KC_TAB,  KC_ENT,  XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX,
+    // DLE   DC1      DC2      DC3      DC4      NAK      SYN      ETB
+    XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX,
+    // CAN   EM       SUB      ESC      FS       GS       RS       US
+    XXXXXXX, XXXXXXX, XXXXXXX, KC_ESC,  XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX,
 
-#endif
+    //       !        "        #        $        %        &        '
+    KC_SPC,  BE_EXLM, BE_QUOT, BE_QUOT, BE_DLR,  BE_UGRV, BE_AMP,  BE_APOS,
+    // (     )        *        +        ,        -        .        /
+    BE_LPRN, BE_RPRN, BE_DLR,  BE_EQL,  BE_COMM, BE_MINS, BE_SCLN, BE_COLN,
+    // 0     1        2        3        4        5        6        7
+    BE_AGRV, BE_AMP,  BE_EACU, BE_QUOT, BE_APOS, BE_LPRN, BE_PARA, BE_EGRV,
+    // 8     9        :        ;        <        =        >        ?
+    BE_EXLM, BE_CCED, BE_COLN, BE_SCLN, BE_LESS, BE_EQL,  BE_LESS, BE_COMM,
+    // @     A        B        C        D        E        F        G
+    BE_EACU, BE_A,    KC_B,    KC_C,    KC_D,    KC_E,    KC_F,    KC_G,
+    // H     I        J        K        L        M        N        O
+    KC_H,    KC_I,    KC_J,    KC_K,    KC_L,    BE_M,    KC_N,    KC_O,
+    // P     Q        R        S        T        U        V        W
+    KC_P,    BE_Q,    KC_R,    KC_S,    KC_T,    KC_U,    KC_V,    BE_W,
+    // X     Y        Z        [        \        ]        ^        _
+    KC_X,    KC_Y,    BE_Z,    BE_CIRC, BE_LESS, BE_DLR,  BE_PARA, BE_MINS,
+    // `     a        b        c        d        e        f        g
+    BE_MU,   BE_A,    KC_B,    KC_C,    KC_D,    KC_E,    KC_F,    KC_G,
+    // h     i        j        k        l        m        n        o
+    KC_H,    KC_I,    KC_J,    KC_K,    KC_L,    BE_M,    KC_N,    KC_O,
+    // p     q        r        s        t        u        v        w
+    KC_P,    BE_Q,    KC_R,    KC_S,    KC_T,    KC_U,    KC_V,    BE_W,
+    // x     y        z        {        |        }        ~        DEL
+    KC_X,    KC_Y,    BE_Z,    BE_CCED, BE_AMP,  BE_AGRV, BE_EQL,  KC_DEL
+};
diff --git a/quantum/keymap_extras/sendstring_bepo.h b/quantum/keymap_extras/sendstring_bepo.h
index c7377e077d..565c55b955 100644
--- a/quantum/keymap_extras/sendstring_bepo.h
+++ b/quantum/keymap_extras/sendstring_bepo.h
@@ -13,29 +13,85 @@
  * You should have received a copy of the GNU General Public License
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
-/* Sendstring definitions for the bépo layout */
-#ifndef SENDSTRING_BEPO
-#define SENDSTRING_BEPO
+
+// Sendstring lookup tables for BÉPO layouts
+
+#pragma once
 
 #include "keymap_bepo.h"
 
-const uint8_t ascii_to_keycode_lut[0x80] PROGMEM = {
-  0,        0,        0,        0,          0,          0,           0,       0,
-  KC_BSPC,  KC_TAB,   KC_ENT,   0,          0,          0,           0,       0,
-  0,        0,        0,        0,          0,          0,           0,       0,
-  0,        0,        0,        KC_ESC,     0,          0,           0,       0,
-  KC_SPC,   BP_DCRC,  BP_DQOT,  BP_DOLLAR,  BP_DOLLAR,  BP_PERCENT,  BP_P,    BP_APOS,
-  BP_LPRN,  BP_RPRN,  BP_ASTR,  BP_PLUS,    BP_COMM,    BP_MINUS,    BP_DOT,  BP_SLSH,
-  KC_0,     KC_1,     KC_2,     KC_3,       KC_4,       KC_5,        KC_6,    KC_7,
-  KC_8,     KC_9,     BP_DOT,   BP_DOT,     KC_2,       BP_EQUAL,    KC_2,    BP_APOS,
-  BP_AT,    BP_A,     BP_B,     BP_C,       BP_D,       BP_E,        BP_F,    BP_G,
-  BP_H,     BP_I,     BP_J,     BP_K,       BP_L,       BP_M,        BP_N,    BP_O,
-  BP_P,     BP_Q,     BP_R,     BP_S,       BP_T,       BP_U,        BP_V,    BP_W,
-  BP_X,     BP_Y,     BP_Z,     KC_4,       BP_AGRV,    KC_5,        KC_5,    KC_MINS,
-  KC_2,     BP_A,     BP_B,     BP_C,       BP_D,       BP_E,        BP_F,    BP_G,
-  BP_H,     BP_I,     BP_J,     BP_K,       BP_L,       BP_M,        BP_N,    BP_O,
-  BP_P,     BP_Q,     BP_R,     BP_S,       BP_T,       BP_U,        BP_V,    BP_W,
-  BP_X,     BP_Y,     BP_Z,     BP_Y,       BP_B,       BP_X,        BP_K,    KC_DEL,
+const bool ascii_to_shift_lut[128] PROGMEM = {
+    0, 0, 0, 0, 0, 0, 0, 0,
+    0, 0, 0, 0, 0, 0, 0, 0,
+    0, 0, 0, 0, 0, 0, 0, 0,
+    0, 0, 0, 0, 0, 0, 0, 0,
+
+    0, 1, 0, 1, 0, 0, 0, 0,
+    0, 0, 0, 0, 0, 0, 0, 0,
+    1, 1, 1, 1, 1, 1, 1, 1,
+    1, 1, 1, 1, 0, 0, 0, 1,
+    0, 1, 1, 1, 1, 1, 1, 1,
+    1, 1, 1, 1, 1, 1, 1, 1,
+    1, 1, 1, 1, 1, 1, 1, 1,
+    1, 1, 1, 0, 0, 0, 0, 0,
+    1, 0, 0, 0, 0, 0, 0, 0,
+    0, 0, 0, 0, 0, 0, 0, 0,
+    0, 0, 0, 0, 0, 0, 0, 0,
+    0, 0, 0, 0, 0, 0, 0, 0
+};
+
+const bool ascii_to_altgr_lut[128] PROGMEM = {
+    0, 0, 0, 0, 0, 0, 0, 0,
+    0, 0, 0, 0, 0, 0, 0, 0,
+    0, 0, 0, 0, 0, 0, 0, 0,
+    0, 0, 0, 0, 0, 0, 0, 0,
+
+    0, 0, 0, 0, 0, 0, 1, 0,
+    0, 0, 0, 0, 0, 0, 0, 0,
+    0, 0, 0, 0, 0, 0, 0, 0,
+    0, 0, 0, 0, 1, 0, 1, 0,
+    0, 0, 0, 0, 0, 0, 0, 0,
+    0, 0, 0, 0, 0, 0, 0, 0,
+    0, 0, 0, 0, 0, 0, 0, 0,
+    0, 0, 0, 1, 1, 1, 1, 1,
+    0, 0, 0, 0, 0, 0, 0, 0,
+    0, 0, 0, 0, 0, 0, 0, 0,
+    0, 0, 0, 0, 0, 0, 0, 0,
+    0, 0, 0, 1, 1, 1, 1, 0
 };
 
-#endif
+const uint8_t ascii_to_keycode_lut[128] PROGMEM = {
+    // NUL   SOH      STX      ETX      EOT      ENQ      ACK      BEL
+    XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX,
+    // BS    TAB      LF       VT       FF       CR       SO       SI
+    KC_BSPC, KC_TAB,  KC_ENT,  XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX,
+    // DLE   DC1      DC2      DC3      DC4      NAK      SYN      ETB
+    XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX,
+    // CAN   EM       SUB      ESC      FS       GS       RS       US
+    XXXXXXX, XXXXXXX, XXXXXXX, KC_ESC,  XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX,
+
+    //       !        "        #        $        %        &        '
+    KC_SPC,  BP_DCRC, BP_DQOT, BP_DLR,  BP_DLR,  BP_PERC, BP_P,    BP_APOS,
+    // (     )        *        +        ,        -        .        /
+    BP_LPRN, BP_RPRN, BP_ASTR, BP_PLUS, BP_COMM, BP_MINS, BP_DOT,  BP_SLSH,
+    // 0     1        2        3        4        5        6        7
+    BP_ASTR, BP_DQOT, BP_LGIL, BP_RGIL, BP_LPRN, BP_RPRN, BP_AT,   BP_PLUS,
+    // 8     9        :        ;        <        =        >        ?
+    BP_MINS, BP_SLSH, BP_DOT,  BP_COMM, BP_LGIL, BP_EQL,  BP_RGIL, BP_APOS,
+    // @     A        B        C        D        E        F        G
+    BP_AT,   BP_A,    BP_B,    BP_C,    BP_D,    BP_E,    BP_F,    BP_G,
+    // H     I        J        K        L        M        N        O
+    BP_H,    BP_I,    BP_J,    BP_K,    BP_L,    BP_M,    BP_N,    BP_O,
+    // P     Q        R        S        T        U        V        W
+    BP_P,    BP_Q,    BP_R,    BP_S,    BP_T,    BP_U,    BP_V,    BP_W,
+    // X     Y        Z        [        \        ]        ^        _
+    BP_X,    BP_Y,    BP_Z,    BP_LPRN, BP_AGRV, BP_RPRN, BP_AT,   KC_SPC,
+    // `     a        b        c        d        e        f        g
+    BP_PERC, BP_A,    BP_B,    BP_C,    BP_D,    BP_E,    BP_F,    BP_G,
+    // h     i        j        k        l        m        n        o
+    BP_H,    BP_I,    BP_J,    BP_K,    BP_L,    BP_M,    BP_N,    BP_O,
+    // p     q        r        s        t        u        v        w
+    BP_P,    BP_Q,    BP_R,    BP_S,    BP_T,    BP_U,    BP_V,    BP_W,
+    // x     y        z        {        |        }        ~        DEL
+    BP_X,    BP_Y,    BP_Z,    BP_Y,    BP_B,    BP_X,    BP_K,    KC_DEL
+};
diff --git a/quantum/keymap_extras/sendstring_colemak.h b/quantum/keymap_extras/sendstring_colemak.h
index fa9ace9290..331f6c2223 100644
--- a/quantum/keymap_extras/sendstring_colemak.h
+++ b/quantum/keymap_extras/sendstring_colemak.h
@@ -13,29 +13,45 @@
  * You should have received a copy of the GNU General Public License
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
-/* Sendstring definitions for the Colemak layout */
-#ifndef SENDSTRING_COLEMAK
-#define SENDSTRING_COLEMAK
+
+// Sendstring lookup tables for Colemak layouts
+
+#pragma once
 
 #include "keymap_colemak.h"
 
-const uint8_t ascii_to_keycode_lut[0x80] PROGMEM = {
-    0, 0, 0, 0, 0, 0, 0, 0,
-    KC_BSPC, KC_TAB, KC_ENT, 0, 0, 0, 0, 0,
-    0, 0, 0, 0, 0, 0, 0, 0,
-    0, 0, 0, KC_ESC, 0, 0, 0, 0,
-    KC_SPC, KC_1, KC_QUOT, KC_3, KC_4, KC_5, KC_7, KC_QUOT,
-    KC_9, KC_0, KC_8, KC_EQL, KC_COMM, KC_MINS, KC_DOT, KC_SLSH,
-    KC_0, KC_1, KC_2, KC_3, KC_4, KC_5, KC_6, KC_7,
-    KC_8, KC_9, CM_SCLN, CM_SCLN, KC_COMM, KC_EQL, KC_DOT, KC_SLSH,
-    KC_2, CM_A, CM_B, CM_C, CM_D, CM_E, CM_F, CM_G,
-    CM_H, CM_I, CM_J, CM_K, CM_L, CM_M, CM_N, CM_O,
-    CM_P, CM_Q, CM_R, CM_S, CM_T, CM_U, CM_V, CM_W,
-    CM_X, CM_Y, CM_Z, KC_LBRC, KC_BSLS, KC_RBRC, KC_6, KC_MINS,
-    KC_GRV, CM_A, CM_B, CM_C, CM_D, CM_E, CM_F, CM_G,
-    CM_H, CM_I, CM_J, CM_K, CM_L, CM_M, CM_N, CM_O,
-    CM_P, CM_Q, CM_R, CM_S, CM_T, CM_U, CM_V, CM_W,
-    CM_X, CM_Y, CM_Z, KC_LBRC, KC_BSLS, KC_RBRC, KC_GRV, KC_DEL
-};
+const uint8_t ascii_to_keycode_lut[128] PROGMEM = {
+    // NUL   SOH      STX      ETX      EOT      ENQ      ACK      BEL
+    XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX,
+    // BS    TAB      LF       VT       FF       CR       SO       SI
+    KC_BSPC, KC_TAB,  KC_ENT,  XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX,
+    // DLE   DC1      DC2      DC3      DC4      NAK      SYN      ETB
+    XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX,
+    // CAN   EM       SUB      ESC      FS       GS       RS       US
+    XXXXXXX, XXXXXXX, XXXXXXX, KC_ESC,  XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX,
 
-#endif
+    //       !        "        #        $        %        &        '
+    KC_SPC,  KC_1,    KC_QUOT, KC_3,    KC_4,    KC_5,    KC_7,    KC_QUOT,
+    // (     )        *        +        ,        -        .        /
+    KC_9,    KC_0,    KC_8,    KC_EQL,  KC_COMM, KC_MINS, KC_DOT,  KC_SLSH,
+    // 0     1        2        3        4        5        6        7
+    KC_0,    KC_1,    KC_2,    KC_3,    KC_4,    KC_5,    KC_6,    KC_7,
+    // 8     9        :        ;        <        =        >        ?
+    KC_8,    KC_9,    CM_SCLN, CM_SCLN, KC_COMM, KC_EQL,  KC_DOT,  KC_SLSH,
+    // @     A        B        C        D        E        F        G
+    KC_2,    CM_A,    CM_B,    CM_C,    CM_D,    CM_E,    CM_F,    CM_G,
+    // H     I        J        K        L        M        N        O
+    CM_H,    CM_I,    CM_J,    CM_K,    CM_L,    CM_M,    CM_N,    CM_O,
+    // P     Q        R        S        T        U        V        W
+    CM_P,    CM_Q,    CM_R,    CM_S,    CM_T,    CM_U,    CM_V,    CM_W,
+    // X     Y        Z        [        \        ]        ^        _
+    CM_X,    CM_Y,    CM_Z,    KC_LBRC, KC_BSLS, KC_RBRC, KC_6,    KC_MINS,
+    // `     a        b        c        d        e        f        g
+    KC_GRV,  CM_A,    CM_B,    CM_C,    CM_D,    CM_E,    CM_F,    CM_G,
+    // h     i        j        k        l        m        n        o
+    CM_H,    CM_I,    CM_J,    CM_K,    CM_L,    CM_M,    CM_N,    CM_O,
+    // p     q        r        s        t        u        v        w
+    CM_P,    CM_Q,    CM_R,    CM_S,    CM_T,    CM_U,    CM_V,    CM_W,
+    // x     y        z        {        |        }        ~        DEL
+    CM_X,    CM_Y,    CM_Z,    KC_LBRC, KC_BSLS, KC_RBRC, KC_GRV,  KC_DEL
+};
diff --git a/quantum/keymap_extras/sendstring_dvorak.h b/quantum/keymap_extras/sendstring_dvorak.h
index f5c5c818b8..f2cb6c4a07 100644
--- a/quantum/keymap_extras/sendstring_dvorak.h
+++ b/quantum/keymap_extras/sendstring_dvorak.h
@@ -13,29 +13,45 @@
  * You should have received a copy of the GNU General Public License
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
-/* Sendstring definitions for the Dvorak layout */
-#ifndef SENDSTRING_DVORAK
-#define SENDSTRING_DVORAK
+
+// Sendstring lookup tables for Dvorak layouts
+
+#pragma once
 
 #include "keymap_dvorak.h"
 
-const uint8_t ascii_to_keycode_lut[0x80] PROGMEM = {
-    0, 0, 0, 0, 0, 0, 0, 0,
-    KC_BSPC, KC_TAB, KC_ENT, 0, 0, 0, 0, 0,
-    0, 0, 0, 0, 0, 0, 0, 0,
-    0, 0, 0, KC_ESC, 0, 0, 0, 0,
-    KC_SPC, DV_1, DV_QUOT, DV_3, DV_4, DV_5, DV_7, DV_QUOT,
-    DV_9, DV_0, DV_8, DV_EQL, DV_COMM, DV_MINS, DV_DOT, DV_SLSH,
-    DV_0, DV_1, DV_2, DV_3, DV_4, DV_5, DV_6, DV_7,
-    DV_8, DV_9, DV_SCLN, DV_SCLN, DV_COMM, DV_EQL, DV_DOT, DV_SLSH,
-    DV_2, DV_A, DV_B, DV_C, DV_D, DV_E, DV_F, DV_G,
-    DV_H, DV_I, DV_J, DV_K, DV_L, DV_M, DV_N, DV_O,
-    DV_P, DV_Q, DV_R, DV_S, DV_T, DV_U, DV_V, DV_W,
-    DV_X, DV_Y, DV_Z, DV_LBRC, DV_BSLS, DV_RBRC, DV_6, DV_MINS,
-    DV_GRV, DV_A, DV_B, DV_C, DV_D, DV_E, DV_F, DV_G,
-    DV_H, DV_I, DV_J, DV_K, DV_L, DV_M, DV_N, DV_O,
-    DV_P, DV_Q, DV_R, DV_S, DV_T, DV_U, DV_V, DV_W,
-    DV_X, DV_Y, DV_Z, DV_LBRC, DV_BSLS, DV_RBRC, DV_GRV, KC_DEL
-};
+const uint8_t ascii_to_keycode_lut[128] PROGMEM = {
+    // NUL   SOH      STX      ETX      EOT      ENQ      ACK      BEL
+    XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX,
+    // BS    TAB      LF       VT       FF       CR       SO       SI
+    KC_BSPC, KC_TAB,  KC_ENT,  XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX,
+    // DLE   DC1      DC2      DC3      DC4      NAK      SYN      ETB
+    XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX,
+    // CAN   EM       SUB      ESC      FS       GS       RS       US
+    XXXXXXX, XXXXXXX, XXXXXXX, KC_ESC,  XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX,
 
-#endif
+    //       !        "        #        $        %        &        '
+    KC_SPC,  DV_1,    DV_QUOT, DV_3,    DV_4,    DV_5,    DV_7,    DV_QUOT,
+    // (     )        *        +        ,        -        .        /
+    DV_9,    DV_0,    DV_8,    DV_EQL,  DV_COMM, DV_MINS, DV_DOT,  DV_SLSH,
+    // 0     1        2        3        4        5        6        7
+    DV_0,    DV_1,    DV_2,    DV_3,    DV_4,    DV_5,    DV_6,    DV_7,
+    // 8     9        :        ;        <        =        >        ?
+    DV_8,    DV_9,    DV_SCLN, DV_SCLN, DV_COMM, DV_EQL,  DV_DOT,  DV_SLSH,
+    // @     A        B        C        D        E        F        G
+    DV_2,    DV_A,    DV_B,    DV_C,    DV_D,    DV_E,    DV_F,    DV_G,
+    // H     I        J        K        L        M        N        O
+    DV_H,    DV_I,    DV_J,    DV_K,    DV_L,    DV_M,    DV_N,    DV_O,
+    // P     Q        R        S        T        U        V        W
+    DV_P,    DV_Q,    DV_R,    DV_S,    DV_T,    DV_U,    DV_V,    DV_W,
+    // X     Y        Z        [        \        ]        ^        _
+    DV_X,    DV_Y,    DV_Z,    DV_LBRC, DV_BSLS, DV_RBRC, DV_6,    DV_MINS,
+    // `     a        b        c        d        e        f        g
+    DV_GRV,  DV_A,    DV_B,    DV_C,    DV_D,    DV_E,    DV_F,    DV_G,
+    // h     i        j        k        l        m        n        o
+    DV_H,    DV_I,    DV_J,    DV_K,    DV_L,    DV_M,    DV_N,    DV_O,
+    // p     q        r        s        t        u        v        w
+    DV_P,    DV_Q,    DV_R,    DV_S,    DV_T,    DV_U,    DV_V,    DV_W,
+    // x     y        z        {        |        }        ~        DEL
+    DV_X,    DV_Y,    DV_Z,    DV_LBRC, DV_BSLS, DV_RBRC, DV_GRV,  KC_DEL
+};
diff --git a/quantum/keymap_extras/sendstring_german.h b/quantum/keymap_extras/sendstring_german.h
index f20fab77d1..61d2248247 100644
--- a/quantum/keymap_extras/sendstring_german.h
+++ b/quantum/keymap_extras/sendstring_german.h
@@ -13,69 +13,85 @@
  * You should have received a copy of the GNU General Public License
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
-/* Sendstring definitions for the German layout */
-#ifndef SENDSTRING_GERMAN
-#define SENDSTRING_GERMAN
+
+// Sendstring lookup tables for German layouts
+
+#pragma once
 
 #include "keymap_german.h"
 
-const bool ascii_to_shift_lut[0x80] PROGMEM = {
+const bool ascii_to_shift_lut[128] PROGMEM = {
     0, 0, 0, 0, 0, 0, 0, 0,
     0, 0, 0, 0, 0, 0, 0, 0,
     0, 0, 0, 0, 0, 0, 0, 0,
     0, 0, 0, 0, 0, 0, 0, 0,
-    
+
     0, 1, 1, 0, 1, 1, 1, 1,
     1, 1, 1, 0, 0, 0, 0, 1,
     0, 0, 0, 0, 0, 0, 0, 0,
     0, 0, 1, 1, 0, 1, 1, 1,
-    1, 1, 1, 1, 1, 1, 1, 1,
+    0, 1, 1, 1, 1, 1, 1, 1,
     1, 1, 1, 1, 1, 1, 1, 1,
     1, 1, 1, 1, 1, 1, 1, 1,
     1, 1, 1, 0, 0, 0, 0, 1,
     1, 0, 0, 0, 0, 0, 0, 0,
     0, 0, 0, 0, 0, 0, 0, 0,
     0, 0, 0, 0, 0, 0, 0, 0,
-    0, 0, 0, 1, 1, 1, 1, 0
+    0, 0, 0, 0, 0, 0, 0, 0
 };
 
-/* Until an ALT table/functionality is added, the following symbols will not work:
-* § @ [ ] { } \ ~ äA öÖ ß ´
-* Following characters can be printed using other characters like so:
-* [ in makro will be ü
-* { in makro will be Ü
-* ~ in makro will be °
-*/
-const uint8_t ascii_to_keycode_lut[0x80] PROGMEM = {
-    0, 0, 0, 0, 0, 0, 0, 0,
-    KC_BSPC, KC_TAB, KC_ENT, 0, 0, 0, 0, 0,
-    0, 0, 0, 0, 0, 0, 0, 0,
-    0, 0, 0, KC_ESC, 0, 0, 0, 0,
+const bool ascii_to_altgr_lut[128] PROGMEM = {
+    0, 0, 0, 0, 0, 0, 0, 0,
+    0, 0, 0, 0, 0, 0, 0, 0,
+    0, 0, 0, 0, 0, 0, 0, 0,
+    0, 0, 0, 0, 0, 0, 0, 0,
 
-  /* SPACE   !     "      #        $     %     &      '                    */
-    KC_SPC, KC_1, KC_2, DE_HASH, KC_4, KC_5, KC_6, DE_HASH,
-  /*  (      )     *      +        ,        -        .       /                    */
-    KC_8, KC_9, DE_PLUS, DE_PLUS, KC_COMM, DE_MINS, KC_DOT, KC_7,
-  /*   0     1     2     3     4     5    6     7                    */
-    KC_0, KC_1, KC_2, KC_3, KC_4, KC_5, KC_6, KC_7,
-  /*   8     9      :       ;         <        =       >       ?                     */
-    KC_8, KC_9, KC_DOT, KC_COMM, DE_LESS,    KC_0, DE_LESS, KC_MINS,
-  /*   @     A     B     C     D     E     F     G                    */
-    KC_2, KC_A, KC_B, KC_C, KC_D, KC_E, KC_F, KC_G,
-  /*   H     I     J     K     L     M     N     O                    */
-    KC_H, KC_I, KC_J, KC_K, KC_L, KC_M, KC_N, KC_O,
-  /*   P     Q     R     S     T     U     V     W                    */
-    KC_P, KC_Q, KC_R, KC_S, KC_T, KC_U, KC_V, KC_W,
-  /*   X     Y     Z      [         \       ]       ^      _                    */
-    KC_X, DE_Y, DE_Z, KC_LBRC, KC_BSLS, KC_RBRC, DE_CIRC, DE_MINS,
-  /*   `       a     b     c     d     e     f     g                    */
-    DE_ACUT, KC_A, KC_B, KC_C, KC_D, KC_E, KC_F, KC_G,
-  /*   h     i     j     k     l     m     n     o                    */
-    KC_H, KC_I, KC_J, KC_K, KC_L, KC_M, KC_N, KC_O,
-  /*    p    q     r     s     t     u     v     w                      */
-    KC_P, KC_Q, KC_R, KC_S, KC_T, KC_U, KC_V, KC_W,
-  /*    x    y     z      {        |        }        ~    DELETE                    */
-    KC_X, DE_Y, DE_Z, KC_LBRC, KC_BSLS, KC_RBRC, KC_GRV, KC_DEL
+    0, 0, 0, 0, 0, 0, 0, 0,
+    0, 0, 0, 0, 0, 0, 0, 0,
+    0, 0, 0, 0, 0, 0, 0, 0,
+    0, 0, 0, 0, 0, 0, 0, 0,
+    1, 0, 0, 0, 0, 0, 0, 0,
+    0, 0, 0, 0, 0, 0, 0, 0,
+    0, 0, 0, 0, 0, 0, 0, 0,
+    0, 0, 0, 1, 1, 1, 0, 0,
+    0, 0, 0, 0, 0, 0, 0, 0,
+    0, 0, 0, 0, 0, 0, 0, 0,
+    0, 0, 0, 0, 0, 0, 0, 0,
+    0, 0, 0, 1, 1, 1, 1, 0
 };
 
-#endif
+const uint8_t ascii_to_keycode_lut[128] PROGMEM = {
+    // NUL   SOH      STX      ETX      EOT      ENQ      ACK      BEL
+    XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX,
+    // BS    TAB      LF       VT       FF       CR       SO       SI
+    KC_BSPC, KC_TAB,  KC_ENT,  XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX,
+    // DLE   DC1      DC2      DC3      DC4      NAK      SYN      ETB
+    XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX,
+    // CAN   EM       SUB      ESC      FS       GS       RS       US
+    XXXXXXX, XXXXXXX, XXXXXXX, KC_ESC,  XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX,
+
+    //       !        "        #        $        %        &        '
+    KC_SPC,  DE_1,    DE_2,    DE_HASH, DE_4,    DE_5,    DE_6,    DE_HASH,
+    // (     )        *        +        ,        -        .        /
+    DE_8,    DE_9,    DE_PLUS, DE_PLUS, DE_COMM, DE_MINS, DE_DOT,  DE_7,
+    // 0     1        2        3        4        5        6        7
+    DE_0,    DE_1,    DE_2,    DE_3,    DE_4,    DE_5,    DE_6,    DE_7,
+    // 8     9        :        ;        <        =        >        ?
+    DE_8,    DE_9,    DE_DOT,  DE_COMM, DE_LESS, DE_0,    DE_LESS, DE_SS,
+    // @     A        B        C        D        E        F        G
+    DE_Q,    DE_A,    DE_B,    DE_C,    DE_D,    DE_E,    DE_F,    DE_G,
+    // H     I        J        K        L        M        N        O
+    DE_H,    DE_I,    DE_J,    DE_K,    DE_L,    DE_M,    DE_N,    DE_O,
+    // P     Q        R        S        T        U        V        W
+    DE_P,    DE_Q,    DE_R,    DE_S,    DE_T,    DE_U,    DE_V,    DE_W,
+    // X     Y        Z        [        \        ]        ^        _
+    DE_X,    DE_Y,    DE_Z,    DE_8,    DE_SS,   DE_9,    DE_CIRC, DE_MINS,
+    // `     a        b        c        d        e        f        g
+    DE_ACUT, DE_A,    DE_B,    DE_C,    DE_D,    DE_E,    DE_F,    DE_G,
+    // h     i        j        k        l        m        n        o
+    DE_H,    DE_I,    DE_J,    DE_K,    DE_L,    DE_M,    DE_N,    DE_O,
+    // p     q        r        s        t        u        v        w
+    DE_P,    DE_Q,    DE_R,    DE_S,    DE_T,    DE_U,    DE_V,    DE_W,
+    // x     y        z        {        |        }        ~        DEL
+    DE_X,    DE_Y,    DE_Z,    DE_7,    DE_LESS, DE_0,    DE_PLUS, KC_DEL
+};
diff --git a/quantum/keymap_extras/sendstring_jis.h b/quantum/keymap_extras/sendstring_jis.h
index c5a38c6a5b..fe42445f4a 100644
--- a/quantum/keymap_extras/sendstring_jis.h
+++ b/quantum/keymap_extras/sendstring_jis.h
@@ -13,15 +13,19 @@
  * You should have received a copy of the GNU General Public License
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
-/* Sendstring definitions for the JIS keyboard layout */
-#ifndef SENDSTRING_JIS
-#define SENDSTRING_JIS
 
-const bool ascii_to_shift_lut[0x80] PROGMEM = {
+// Sendstring lookup tables for JIS layouts
+
+#pragma once
+
+#include "keymap_jp.h"
+
+const bool ascii_to_shift_lut[128] PROGMEM = {
     0, 0, 0, 0, 0, 0, 0, 0,
     0, 0, 0, 0, 0, 0, 0, 0,
     0, 0, 0, 0, 0, 0, 0, 0,
     0, 0, 0, 0, 0, 0, 0, 0,
+
     0, 1, 1, 1, 1, 1, 1, 1,
     1, 1, 1, 1, 0, 0, 0, 0,
     0, 0, 0, 0, 0, 0, 0, 0,
@@ -36,23 +40,38 @@ const bool ascii_to_shift_lut[0x80] PROGMEM = {
     0, 0, 0, 1, 1, 1, 1, 0
 };
 
-const uint8_t ascii_to_keycode_lut[0x80] PROGMEM = {
-    0, 0, 0, 0, 0, 0, 0, 0,
-    KC_BSPC, KC_TAB, KC_ENT, 0, 0, 0, 0, 0,
-    0, 0, 0, 0, 0, 0, 0, 0,
-    0, 0, 0, KC_ESC, 0, 0, 0, 0,
-    KC_SPC, KC_1, KC_2, KC_3, KC_4, KC_5, KC_6, KC_7,
-    KC_8, KC_9, KC_QUOT, KC_SCLN, KC_COMM, KC_MINS, KC_DOT, KC_SLSH,
-    KC_0, KC_1, KC_2, KC_3, KC_4, KC_5, KC_6, KC_7,
-    KC_8, KC_9, KC_QUOT, KC_SCLN, KC_COMM, KC_MINS, KC_DOT, KC_SLSH,
-    KC_LBRC, KC_A, KC_B, KC_C, KC_D, KC_E, KC_F, KC_G,
-    KC_H, KC_I, KC_J, KC_K, KC_L, KC_M, KC_N, KC_O,
-    KC_P, KC_Q, KC_R, KC_S, KC_T, KC_U, KC_V, KC_W,
-    KC_X, KC_Y, KC_Z, KC_RBRC, KC_JYEN, KC_BSLS, KC_EQL, KC_RO,
-    KC_LBRC, KC_A, KC_B, KC_C, KC_D, KC_E, KC_F, KC_G,
-    KC_H, KC_I, KC_J, KC_K, KC_L, KC_M, KC_N, KC_O,
-    KC_P, KC_Q, KC_R, KC_S, KC_T, KC_U, KC_V, KC_W,
-    KC_X, KC_Y, KC_Z, KC_RBRC, KC_JYEN, KC_BSLS, KC_EQL, KC_DEL,
-};
+const uint8_t ascii_to_keycode_lut[128] PROGMEM = {
+    // NUL   SOH      STX      ETX      EOT      ENQ      ACK      BEL
+    XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX,
+    // BS    TAB      LF       VT       FF       CR       SO       SI
+    KC_BSPC, KC_TAB,  KC_ENT,  XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX,
+    // DLE   DC1      DC2      DC3      DC4      NAK      SYN      ETB
+    XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX,
+    // CAN   EM       SUB      ESC      FS       GS       RS       US
+    XXXXXXX, XXXXXXX, XXXXXXX, KC_ESC,  XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX,
 
-#endif
+    //       !        "        #        $        %        &        '
+    KC_SPC,  KC_1,    KC_2,    KC_3,    KC_4,    KC_5,    KC_6,    KC_7,
+    // (     )        *        +        ,        -        .        /
+    KC_8,    KC_9,    JP_COLN, JP_SCLN, JP_COMM, JP_MINS, JP_DOT,  JP_SLSH,
+    // 0     1        2        3        4        5        6        7
+    KC_0,    KC_1,    KC_2,    KC_3,    KC_4,    KC_5,    KC_6,    KC_7,
+    // 8     9        :        ;        <        =        >        ?
+    KC_8,    KC_9,    JP_COLN, JP_SCLN, JP_COMM, JP_MINS, JP_DOT,  JP_SLSH,
+    // @     A        B        C        D        E        F        G
+    JP_AT,   KC_A,    KC_B,    KC_C,    KC_D,    KC_E,    KC_F,    KC_G,
+    // H     I        J        K        L        M        N        O
+    KC_H,    KC_I,    KC_J,    KC_K,    KC_L,    KC_M,    KC_N,    KC_O,
+    // P     Q        R        S        T        U        V        W
+    KC_P,    KC_Q,    KC_R,    KC_S,    KC_T,    KC_U,    KC_V,    KC_W,
+    // X     Y        Z        [        \        ]        ^        _
+    KC_X,    KC_Y,    KC_Z,    JP_LBRC, JP_BSLS, JP_RBRC, JP_CIRC, JP_BSLS,
+    // `     a        b        c        d        e        f        g
+    JP_AT,   KC_A,    KC_B,    KC_C,    KC_D,    KC_E,    KC_F,    KC_G,
+    // h     i        j        k        l        m        n        o
+    KC_H,    KC_I,    KC_J,    KC_K,    KC_L,    KC_M,    KC_N,    KC_O,
+    // p     q        r        s        t        u        v        w
+    KC_P,    KC_Q,    KC_R,    KC_S,    KC_T,    KC_U,    KC_V,    KC_W,
+    // x     y        z        {        |        }        ~        DEL
+    KC_X,    KC_Y,    KC_Z,    JP_LBRC, JP_YEN,  JP_RBRC, JP_CIRC, KC_DEL
+};
diff --git a/quantum/keymap_extras/sendstring_norman.h b/quantum/keymap_extras/sendstring_norman.h
index 57d450ca85..8d4ec8dabd 100644
--- a/quantum/keymap_extras/sendstring_norman.h
+++ b/quantum/keymap_extras/sendstring_norman.h
@@ -13,27 +13,45 @@
  * You should have received a copy of the GNU General Public License
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
-/* Sendstring definitions for the Colemak layout */
+
+// Sendstring lookup tables for Norman layouts
+
 #pragma once
 
 #include "keymap_norman.h"
 
-const uint8_t ascii_to_keycode_lut[0x80] PROGMEM = {
-    0, 0, 0, 0, 0, 0, 0, 0,
-    KC_BSPC, KC_TAB, KC_ENT, 0, 0, 0, 0, 0,
-    0, 0, 0, 0, 0, 0, 0, 0,
-    0, 0, 0, KC_ESC, 0, 0, 0, 0,
-    KC_SPC, KC_1, KC_QUOT, KC_3, KC_4, KC_5, KC_7, KC_QUOT,
-    KC_9, KC_0, KC_8, KC_EQL, KC_COMM, KC_MINS, KC_DOT, KC_SLSH,
-    KC_0, KC_1, KC_2, KC_3, KC_4, KC_5, KC_6, KC_7,
-    KC_8, KC_9, NM_SCLN, NM_SCLN, KC_COMM, KC_EQL, KC_DOT, KC_SLSH,
-    KC_2, NM_A, NM_B, NM_C, NM_D, NM_E, NM_F, NM_G,
-    NM_H, NM_I, NM_J, NM_K, NM_L, NM_M, NM_N, NM_O,
-    NM_P, NM_Q, NM_R, NM_S, NM_T, NM_U, NM_V, NM_W,
-    NM_X, NM_Y, NM_Z, KC_LBRC, KC_BSLS, KC_RBRC, KC_6, KC_MINS,
-    KC_GRV, NM_A, NM_B, NM_C, NM_D, NM_E, NM_F, NM_G,
-    NM_H, NM_I, NM_J, NM_K, NM_L, NM_M, NM_N, NM_O,
-    NM_P, NM_Q, NM_R, NM_S, NM_T, NM_U, NM_V, NM_W,
-    NM_X, NM_Y, NM_Z, KC_LBRC, KC_BSLS, KC_RBRC, KC_GRV, KC_DEL
-};
+const uint8_t ascii_to_keycode_lut[128] PROGMEM = {
+    // NUL   SOH      STX      ETX      EOT      ENQ      ACK      BEL
+    XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX,
+    // BS    TAB      LF       VT       FF       CR       SO       SI
+    KC_BSPC, KC_TAB,  KC_ENT,  XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX,
+    // DLE   DC1      DC2      DC3      DC4      NAK      SYN      ETB
+    XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX,
+    // CAN   EM       SUB      ESC      FS       GS       RS       US
+    XXXXXXX, XXXXXXX, XXXXXXX, KC_ESC,  XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX,
 
+    //       !        "        #        $        %        &        '
+    KC_SPC,  KC_1,    KC_QUOT, KC_3,    KC_4,    KC_5,    KC_7,    KC_QUOT,
+    // (     )        *        +        ,        -        .        /
+    KC_9,    KC_0,    KC_8,    KC_EQL,  KC_COMM, KC_MINS, KC_DOT,  KC_SLSH,
+    // 0     1        2        3        4        5        6        7
+    KC_0,    KC_1,    KC_2,    KC_3,    KC_4,    KC_5,    KC_6,    KC_7,
+    // 8     9        :        ;        <        =        >        ?
+    KC_8,    KC_9,    NM_SCLN, NM_SCLN, KC_COMM, KC_EQL,  KC_DOT,  KC_SLSH,
+    // @     A        B        C        D        E        F        G
+    KC_2,    NM_A,    NM_B,    NM_C,    NM_D,    NM_E,    NM_F,    NM_G,
+    // H     I        J        K        L        M        N        O
+    NM_H,    NM_I,    NM_J,    NM_K,    NM_L,    NM_M,    NM_N,    NM_O,
+    // P     Q        R        S        T        U        V        W
+    NM_P,    NM_Q,    NM_R,    NM_S,    NM_T,    NM_U,    NM_V,    NM_W,
+    // X     Y        Z        [        \        ]        ^        _
+    NM_X,    NM_Y,    NM_Z,    KC_LBRC, KC_BSLS, KC_RBRC, KC_6,    KC_MINS,
+    // `     a        b        c        d        e        f        g
+    KC_GRV,  NM_A,    NM_B,    NM_C,    NM_D,    NM_E,    NM_F,    NM_G,
+    // h     i        j        k        l        m        n        o
+    NM_H,    NM_I,    NM_J,    NM_K,    NM_L,    NM_M,    NM_N,    NM_O,
+    // p     q        r        s        t        u        v        w
+    NM_P,    NM_Q,    NM_R,    NM_S,    NM_T,    NM_U,    NM_V,    NM_W,
+    // x     y        z        {        |        }        ~        DEL
+    NM_X,    NM_Y,    NM_Z,    KC_LBRC, KC_BSLS, KC_RBRC, KC_GRV,  KC_DEL
+};
diff --git a/quantum/keymap_extras/sendstring_spanish.h b/quantum/keymap_extras/sendstring_spanish.h
index 7194459290..985d602880 100644
--- a/quantum/keymap_extras/sendstring_spanish.h
+++ b/quantum/keymap_extras/sendstring_spanish.h
@@ -13,59 +13,85 @@
  * You should have received a copy of the GNU General Public License
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
-/* Sendstring definitions for the Spanish layout */
-#ifndef SENDSTRING_SPANISH
-#define SENDSTRING_SPANISH
+
+// Sendstring lookup tables for Spanish layouts
+
+#pragma once
 
 #include "keymap_spanish.h"
 
-const bool ascii_to_shift_lut[0x80] PROGMEM = {
+const bool ascii_to_shift_lut[128] PROGMEM = {
     0, 0, 0, 0, 0, 0, 0, 0,
     0, 0, 0, 0, 0, 0, 0, 0,
     0, 0, 0, 0, 0, 0, 0, 0,
     0, 0, 0, 0, 0, 0, 0, 0,
 
-    0, 1, 1, 1, 1, 1, 1, 0,
+    0, 1, 1, 0, 1, 1, 1, 0,
     1, 1, 1, 0, 0, 0, 0, 1,
     0, 0, 0, 0, 0, 0, 0, 0,
-
     0, 0, 1, 1, 0, 1, 1, 1,
+    0, 1, 1, 1, 1, 1, 1, 1,
     1, 1, 1, 1, 1, 1, 1, 1,
     1, 1, 1, 1, 1, 1, 1, 1,
-    1, 1, 1, 1, 1, 1, 1, 1,
-    
     1, 1, 1, 0, 0, 0, 1, 1,
     0, 0, 0, 0, 0, 0, 0, 0,
     0, 0, 0, 0, 0, 0, 0, 0,
     0, 0, 0, 0, 0, 0, 0, 0,
-    0, 0, 0, 1, 1, 1, 1, 0
+    0, 0, 0, 0, 0, 0, 0, 0
 };
 
-/* Until an ALT table/functionality is added, the following symbols will not work:
- # @ [ ] { } | ~
-*/
-const uint8_t ascii_to_keycode_lut[0x80] PROGMEM = {
-    0, 0, 0, 0, 0, 0, 0, 0,
-    KC_BSPC, KC_TAB, KC_ENT, 0, 0, 0, 0, 0,
-    0, 0, 0, 0, 0, 0, 0, 0,
-    0, 0, 0, KC_ESC, 0, 0, 0, 0,
-/*        ,   !    "      #     $    %     &      '    */
-    KC_SPC, KC_1, KC_2, KC_3, KC_4, KC_5, KC_6, ES_APOS,
-/*    (     )       *        +         ,       -        .     /    */
-    KC_8, KC_9, ES_PLUS,  ES_PLUS, KC_COMM, ES_MINS, KC_DOT, KC_7,
-    KC_0, KC_1, KC_2, KC_3, KC_4, KC_5, KC_6, KC_7,
-/*    8     9       :        ;        <      =     >         ?    */
-    KC_8, KC_9, KC_DOT, KC_COMM, KC_NUBS,  KC_0, KC_NUBS,  ES_APOS,
-/*    @     A      B    C    D      E     F     G                 */
-    KC_2, KC_A, KC_B, KC_C, KC_D, KC_E, KC_F, KC_G,
-    KC_H, KC_I, KC_J, KC_K, KC_L, KC_M, KC_N, KC_O,
-    KC_P, KC_Q, KC_R, KC_S, KC_T, KC_U, KC_V, KC_W,
-/*    X     Y     Z      [         \      ]        ^       _    */    
-    KC_X, KC_Y, KC_Z, KC_LBRC, KC_BSLS, KC_RBRC, ES_GRV, ES_MINS,
-    ES_GRV, KC_A, KC_B, KC_C, KC_D, KC_E, KC_F, KC_G,
-    KC_H, KC_I, KC_J, KC_K, KC_L, KC_M, KC_N, KC_O,
-    KC_P, KC_Q, KC_R, KC_S, KC_T, KC_U, KC_V, KC_W,
-    KC_X, KC_Y, KC_Z, KC_LBRC, KC_BSLS, KC_RBRC, KC_GRV, KC_DEL
+const bool ascii_to_altgr_lut[128] PROGMEM = {
+    0, 0, 0, 0, 0, 0, 0, 0,
+    0, 0, 0, 0, 0, 0, 0, 0,
+    0, 0, 0, 0, 0, 0, 0, 0,
+    0, 0, 0, 0, 0, 0, 0, 0,
+
+    0, 0, 0, 1, 0, 0, 0, 0,
+    0, 0, 0, 0, 0, 0, 0, 0,
+    0, 0, 0, 0, 0, 0, 0, 0,
+    0, 0, 0, 0, 0, 0, 0, 0,
+    1, 0, 0, 0, 0, 0, 0, 0,
+    0, 0, 0, 0, 0, 0, 0, 0,
+    0, 0, 0, 0, 0, 0, 0, 0,
+    0, 0, 0, 1, 1, 1, 0, 0,
+    0, 0, 0, 0, 0, 0, 0, 0,
+    0, 0, 0, 0, 0, 0, 0, 0,
+    0, 0, 0, 0, 0, 0, 0, 0,
+    0, 0, 0, 1, 1, 1, 1, 0
 };
 
-#endif
+const uint8_t ascii_to_keycode_lut[128] PROGMEM = {
+    // NUL   SOH      STX      ETX      EOT      ENQ      ACK      BEL
+    XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX,
+    // BS    TAB      LF       VT       FF       CR       SO       SI
+    KC_BSPC, KC_TAB,  KC_ENT,  XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX,
+    // DLE   DC1      DC2      DC3      DC4      NAK      SYN      ETB
+    XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX,
+    // CAN   EM       SUB      ESC      FS       GS       RS       US
+    XXXXXXX, XXXXXXX, XXXXXXX, KC_ESC,  XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX,
+
+    //       !        "        #        $        %        &        '
+    KC_SPC,  KC_1,    KC_2,    KC_3,    KC_4,    KC_5,    KC_6,    ES_APOS,
+    // (     )        *        +        ,        -        .        /
+    KC_8,    KC_9,    ES_PLUS, ES_PLUS, KC_COMM, ES_MINS, KC_DOT,  KC_7,
+    // 0     1        2        3        4        5        6        7
+    KC_0,    KC_1,    KC_2,    KC_3,    KC_4,    KC_5,    KC_6,    KC_7,
+    // 8     9        :        ;        <        =        >        ?
+    KC_8,    KC_9,    KC_DOT,  KC_COMM, ES_LESS, KC_0,    ES_LESS, ES_APOS,
+    // @     A        B        C        D        E        F        G
+    KC_2,    KC_A,    KC_B,    KC_C,    KC_D,    KC_E,    KC_F,    KC_G,
+    // H     I        J        K        L        M        N        O
+    KC_H,    KC_I,    KC_J,    KC_K,    KC_L,    KC_M,    KC_N,    KC_O,
+    // P     Q        R        S        T        U        V        W
+    KC_P,    KC_Q,    KC_R,    KC_S,    KC_T,    KC_U,    KC_V,    KC_W,
+    // X     Y        Z        [        \        ]        ^        _
+    KC_X,    KC_Y,    KC_Z,    ES_GRV,  ES_OVRR, ES_PLUS, ES_GRV,  ES_MINS,
+    // `     a        b        c        d        e        f        g
+    ES_GRV,  KC_A,    KC_B,    KC_C,    KC_D,    KC_E,    KC_F,    KC_G,
+    // h     i        j        k        l        m        n        o
+    KC_H,    KC_I,    KC_J,    KC_K,    KC_L,    KC_M,    KC_N,    KC_O,
+    // p     q        r        s        t        u        v        w
+    KC_P,    KC_Q,    KC_R,    KC_S,    KC_T,    KC_U,    KC_V,    KC_W,
+    // x     y        z        {        |        }        ~        DEL
+    KC_X,    KC_Y,    KC_Z,    ES_ACUT, KC_1,    ES_CCED, ES_NTIL, KC_DEL
+};
diff --git a/quantum/keymap_extras/sendstring_uk.h b/quantum/keymap_extras/sendstring_uk.h
index 2824e5d444..a01c9bc439 100644
--- a/quantum/keymap_extras/sendstring_uk.h
+++ b/quantum/keymap_extras/sendstring_uk.h
@@ -14,12 +14,13 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
-/* SEND_STRING() LUTs for UK layouts */
+// Sendstring lookup tables for UK layouts
 
-#ifndef SENDSTRING_UK
-#define SENDSTRING_UK
+#pragma once
 
-const bool ascii_to_shift_lut[0x80] PROGMEM = {
+#include "keymap_uk.h"
+
+const bool ascii_to_shift_lut[128] PROGMEM = {
     0, 0, 0, 0, 0, 0, 0, 0,
     0, 0, 0, 0, 0, 0, 0, 0,
     0, 0, 0, 0, 0, 0, 0, 0,
@@ -39,24 +40,38 @@ const bool ascii_to_shift_lut[0x80] PROGMEM = {
     0, 0, 0, 1, 1, 1, 1, 0
 };
 
-const uint8_t ascii_to_keycode_lut[0x80] PROGMEM = {
-    0, 0, 0, 0, 0, 0, 0, 0,
-    KC_BSPC, KC_TAB, KC_ENT, 0, 0, 0, 0, 0,
-    0, 0, 0, 0, 0, 0, 0, 0,
-    0, 0, 0, KC_ESC, 0, 0, 0, 0,
+const uint8_t ascii_to_keycode_lut[128] PROGMEM = {
+    // NUL   SOH      STX      ETX      EOT      ENQ      ACK      BEL
+    XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX,
+    // BS    TAB      LF       VT       FF       CR       SO       SI
+    KC_BSPC, KC_TAB,  KC_ENT,  XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX,
+    // DLE   DC1      DC2      DC3      DC4      NAK      SYN      ETB
+    XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX,
+    // CAN   EM       SUB      ESC      FS       GS       RS       US
+    XXXXXXX, XXXXXXX, XXXXXXX, KC_ESC,  XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX,
 
-    KC_SPC, KC_1, KC_2, KC_NUHS, KC_4, KC_5, KC_7, KC_QUOT,
-    KC_9, KC_0, KC_8, KC_EQL, KC_COMM, KC_MINS, KC_DOT, KC_SLSH,
-    KC_0, KC_1, KC_2, KC_3, KC_4, KC_5, KC_6, KC_7,
-    KC_8, KC_9, KC_SCLN, KC_SCLN, KC_COMM, KC_EQL, KC_DOT, KC_SLSH,
-    KC_QUOT, KC_A, KC_B, KC_C, KC_D, KC_E, KC_F, KC_G,
-    KC_H, KC_I, KC_J, KC_K, KC_L, KC_M, KC_N, KC_O,
-    KC_P, KC_Q, KC_R, KC_S, KC_T, KC_U, KC_V, KC_W,
-    KC_X, KC_Y, KC_Z, KC_LBRC, KC_BSLS, KC_RBRC, KC_6, KC_MINS,
-    KC_GRV, KC_A, KC_B, KC_C, KC_D, KC_E, KC_F, KC_G,
-    KC_H, KC_I, KC_J, KC_K, KC_L, KC_M, KC_N, KC_O,
-    KC_P, KC_Q, KC_R, KC_S, KC_T, KC_U, KC_V, KC_W,
-    KC_X, KC_Y, KC_Z, KC_LBRC, KC_BSLS, KC_RBRC, KC_GRV, KC_DEL
+    //       !        "        #        $        %        &        '
+    UK_SPC,  UK_1,    UK_2,    UK_HASH, UK_4,    UK_5,    UK_7,    UK_QUOT,
+    // (     )        *        +        ,        -        .        /
+    UK_9,    UK_0,    UK_8,    UK_EQL,  UK_COMM, UK_MINS, UK_DOT,  UK_SLSH,
+    // 0     1        2        3        4        5        6        7
+    UK_0,    UK_1,    UK_2,    UK_3,    UK_4,    UK_5,    UK_6,    UK_7,
+    // 8     9        :        ;        <        =        >        ?
+    UK_8,    UK_9,    UK_SCLN, UK_SCLN, UK_COMM, UK_EQL,  UK_DOT,  UK_SLSH,
+    // @     A        B        C        D        E        F        G
+    UK_QUOT, UK_A,    UK_B,    UK_C,    UK_D,    UK_E,    UK_F,    UK_G,
+    // H     I        J        K        L        M        N        O
+    UK_H,    UK_I,    UK_J,    UK_K,    UK_L,    UK_M,    UK_N,    UK_O,
+    // P     Q        R        S        T        U        V        W
+    UK_P,    UK_Q,    UK_R,    UK_S,    UK_T,    UK_U,    UK_V,    UK_W,
+    // X     Y        Z        [        \        ]        ^        _
+    UK_X,    UK_Y,    UK_Z,    UK_LBRC, UK_BSLS, UK_RBRC, UK_6,    UK_MINS,
+    // `     a        b        c        d        e        f        g
+    UK_GRV,  UK_A,    UK_B,    UK_C,    UK_D,    UK_E,    UK_F,    UK_G,
+    // h     i        j        k        l        m        n        o
+    UK_H,    UK_I,    UK_J,    UK_K,    UK_L,    UK_M,    UK_N,    UK_O,
+    // p     q        r        s        t        u        v        w
+    UK_P,    UK_Q,    UK_R,    UK_S,    UK_T,    UK_U,    UK_V,    UK_W,
+    // x     y        z        {        |        }        ~        DEL
+    UK_X,    UK_Y,    UK_Z,    UK_LBRC, UK_BSLS, UK_RBRC, UK_HASH, KC_DEL
 };
-
-#endif
diff --git a/quantum/keymap_extras/sendstring_workman.h b/quantum/keymap_extras/sendstring_workman.h
index a8571839da..a0dd4756ff 100644
--- a/quantum/keymap_extras/sendstring_workman.h
+++ b/quantum/keymap_extras/sendstring_workman.h
@@ -13,29 +13,45 @@
  * You should have received a copy of the GNU General Public License
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
-/* Sendstring definitions for the Workman layout */
-#ifndef SENDSTRING_WORKMAN
-#define SENDSTRING_WORKMAN
+
+// Sendstring lookup tables for Workman layouts
+
+#pragma once
 
 #include "keymap_workman.h"
 
-const uint8_t ascii_to_keycode_lut[0x80] PROGMEM = {
-    0,       0,      0,       0,       0,       0,       0,      0,
-    KC_BSPC, KC_TAB, KC_ENT,  0,       0,       0,       0,      0,
-    0,       0,      0,       0,       0,       0,       0,      0,
-    0,       0,      0,       KC_ESC,  0,       0,       0,      0,
-    KC_SPC,  KC_1,   KC_QUOT, KC_3,    KC_4,    KC_5,    KC_7,   KC_QUOT,
-    KC_9,    KC_0,   KC_8,    KC_EQL,  KC_COMM, KC_MINS, KC_DOT, KC_SLSH,
-    KC_0,    KC_1,   KC_2,    KC_3,    KC_4,    KC_5,    KC_6,   KC_7,
-    KC_8,    KC_9,   KC_SCLN, KC_SCLN, KC_COMM, KC_EQL,  KC_DOT, KC_SLSH,
-    KC_2,    WK_A,   WK_B,    WK_C,    WK_D,    WK_E,    WK_F,   WK_G,
-    WK_H,    WK_I,   WK_J,    WK_K,    WK_L,    WK_M,    WK_N,   WK_O,
-    WK_P,    WK_Q,   WK_R,    WK_S,    WK_T,    WK_U,    WK_V,   WK_W,
-    WK_X,    WK_Y,   WK_Z,    KC_LBRC, KC_BSLS, KC_RBRC, KC_6,   KC_MINS,
-    KC_GRV,  WK_A,   WK_B,    WK_C,    WK_D,    WK_E,    WK_F,   WK_G,
-    WK_H,    WK_I,   WK_J,    WK_K,    WK_L,    WK_M,    WK_N,   WK_O,
-    WK_P,    WK_Q,   WK_R,    WK_S,    WK_T,    WK_U,    WK_V,   WK_W,
-    WK_X,    WK_Y,   WK_Z,    KC_LBRC, KC_BSLS, KC_RBRC, KC_GRV, KC_DEL
-};
+const uint8_t ascii_to_keycode_lut[128] PROGMEM = {
+    // NUL   SOH      STX      ETX      EOT      ENQ      ACK      BEL
+    XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX,
+    // BS    TAB      LF       VT       FF       CR       SO       SI
+    KC_BSPC, KC_TAB,  KC_ENT,  XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX,
+    // DLE   DC1      DC2      DC3      DC4      NAK      SYN      ETB
+    XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX,
+    // CAN   EM       SUB      ESC      FS       GS       RS       US
+    XXXXXXX, XXXXXXX, XXXXXXX, KC_ESC,  XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX,
 
-#endif
\ No newline at end of file
+    //       !        "        #        $        %        &        '
+    KC_SPC,  KC_1,    KC_QUOT, KC_3,    KC_4,    KC_5,    KC_7,    KC_QUOT,
+    // (     )        *        +        ,        -        .        /
+    KC_9,    KC_0,    KC_8,    KC_EQL,  KC_COMM, KC_MINS, KC_DOT,  KC_SLSH,
+    // 0     1        2        3        4        5        6        7
+    KC_0,    KC_1,    KC_2,    KC_3,    KC_4,    KC_5,    KC_6,    KC_7,
+    // 8     9        :        ;        <        =        >        ?
+    KC_8,    KC_9,    KC_SCLN, KC_SCLN, KC_COMM, KC_EQL,  KC_DOT,  KC_SLSH,
+    // @     A        B        C        D        E        F        G
+    KC_2,    WK_A,    WK_B,    WK_C,    WK_D,    WK_E,    WK_F,    WK_G,
+    // H     I        J        K        L        M        N        O
+    WK_H,    WK_I,    WK_J,    WK_K,    WK_L,    WK_M,    WK_N,    WK_O,
+    // P     Q        R        S        T        U        V        W
+    WK_P,    WK_Q,    WK_R,    WK_S,    WK_T,    WK_U,    WK_V,    WK_W,
+    // X     Y        Z        [        \        ]        ^        _
+    WK_X,    WK_Y,    WK_Z,    KC_LBRC, KC_BSLS, KC_RBRC, KC_6,    KC_MINS,
+    // `     a        b        c        d        e        f        g
+    KC_GRV,  WK_A,    WK_B,    WK_C,    WK_D,    WK_E,    WK_F,    WK_G,
+    // h     i        j        k        l        m        n        o
+    WK_H,    WK_I,    WK_J,    WK_K,    WK_L,    WK_M,    WK_N,    WK_O,
+    // p     q        r        s        t        u        v        w
+    WK_P,    WK_Q,    WK_R,    WK_S,    WK_T,    WK_U,    WK_V,    WK_W,
+    // x     y        z        {        |        }        ~        DEL
+    WK_X,    WK_Y,    WK_Z,    KC_LBRC, KC_BSLS, KC_RBRC, KC_GRV,  KC_DEL
+};