diff --git a/frontend/src/ts/input/handlers/keydown.ts b/frontend/src/ts/input/handlers/keydown.ts
index 09f82c8c36b9..517d6d8e2524 100644
--- a/frontend/src/ts/input/handlers/keydown.ts
+++ b/frontend/src/ts/input/handlers/keydown.ts
@@ -1,6 +1,6 @@
 import { Config } from "../../config/store";
 import * as TestLogic from "../../test/test-logic";
-import { getCharFromEvent } from "../../test/layout-emulator";
+import { getCharFromEvent, mayEmulateChar } from "../../test/layout-emulator";
 import { emulateInsertText } from "./insert-text";
 import {
   showNoticeNotification,
@@ -153,13 +153,13 @@ export async function onKeydown(event: KeyboardEvent): Promise<void> {
     return;
   }
 
-  if (Config.layout !== "default") {
+  if (Config.layout !== "default" && mayEmulateChar(event)) {
+    event.preventDefault();
     const emulatedChar = await getCharFromEvent(event);
     if (emulatedChar !== null) {
       await emulateInsertText({ data: emulatedChar, now });
-      event.preventDefault();
-      return;
     }
+    return;
   }
 
   if (event.key === "Tab") {
diff --git a/frontend/src/ts/test/layout-emulator.ts b/frontend/src/ts/test/layout-emulator.ts
index 4ed03c45324d..ebac42b5cad1 100644
--- a/frontend/src/ts/test/layout-emulator.ts
+++ b/frontend/src/ts/test/layout-emulator.ts
@@ -6,6 +6,166 @@ import { __nonReactive } from "../states/test";
 let isAltGrPressed = false;
 const isPunctuationPattern = /\p{P}/u;
 
+const ANSI_KEYCODES = [
+  "Backquote",
+  "Digit1",
+  "Digit2",
+  "Digit3",
+  "Digit4",
+  "Digit5",
+  "Digit6",
+  "Digit7",
+  "Digit8",
+  "Digit9",
+  "Digit0",
+  "Minus",
+  "Equal",
+  "KeyQ",
+  "KeyW",
+  "KeyE",
+  "KeyR",
+  "KeyT",
+  "KeyY",
+  "KeyU",
+  "KeyI",
+  "KeyO",
+  "KeyP",
+  "BracketLeft",
+  "BracketRight",
+  "Backslash",
+  "KeyA",
+  "KeyS",
+  "KeyD",
+  "KeyF",
+  "KeyG",
+  "KeyH",
+  "KeyJ",
+  "KeyK",
+  "KeyL",
+  "Semicolon",
+  "Quote",
+  "KeyZ",
+  "KeyX",
+  "KeyC",
+  "KeyV",
+  "KeyB",
+  "KeyN",
+  "KeyM",
+  "Comma",
+  "Period",
+  "Slash",
+  "Space",
+];
+
+const ISO_KEYCODES = [
+  "Backquote",
+  "Digit1",
+  "Digit2",
+  "Digit3",
+  "Digit4",
+  "Digit5",
+  "Digit6",
+  "Digit7",
+  "Digit8",
+  "Digit9",
+  "Digit0",
+  "Minus",
+  "Equal",
+  "KeyQ",
+  "KeyW",
+  "KeyE",
+  "KeyR",
+  "KeyT",
+  "KeyY",
+  "KeyU",
+  "KeyI",
+  "KeyO",
+  "KeyP",
+  "BracketLeft",
+  "BracketRight",
+  "KeyA",
+  "KeyS",
+  "KeyD",
+  "KeyF",
+  "KeyG",
+  "KeyH",
+  "KeyJ",
+  "KeyK",
+  "KeyL",
+  "Semicolon",
+  "Quote",
+  "Backslash",
+  "IntlBackslash",
+  "KeyZ",
+  "KeyX",
+  "KeyC",
+  "KeyV",
+  "KeyB",
+  "KeyN",
+  "KeyM",
+  "Comma",
+  "Period",
+  "Slash",
+  "Space",
+];
+
+const MATRIX_KEYCODES = [
+  "Backquote",
+  "Digit1",
+  "Digit2",
+  "Digit3",
+  "Digit4",
+  "Digit5",
+  "Digit6",
+  "Digit7",
+  "Digit8",
+  "Digit9",
+  "Digit0",
+  "Minus",
+  "Equal",
+  "KeyQ",
+  "KeyW",
+  "KeyE",
+  "KeyR",
+  "KeyT",
+  "KeyY",
+  "KeyU",
+  "KeyI",
+  "KeyO",
+  "KeyP",
+  "BracketLeft",
+  "BracketRight",
+  "Backslash",
+  "KeyA",
+  "KeyS",
+  "KeyD",
+  "KeyF",
+  "KeyG",
+  "KeyH",
+  "KeyJ",
+  "KeyK",
+  "KeyL",
+  "Semicolon",
+  "Quote",
+  "KeyZ",
+  "KeyX",
+  "KeyC",
+  "KeyV",
+  "KeyB",
+  "KeyN",
+  "KeyM",
+  "Comma",
+  "Period",
+  "Slash",
+  "Space",
+];
+
+const EMULATED_KEY_CODES = new Set([
+  ...ANSI_KEYCODES,
+  ...ISO_KEYCODES,
+  ...MATRIX_KEYCODES,
+]);
+
 export async function getCharFromEvent(
   event: KeyboardEvent,
 ): Promise<string | null> {
@@ -40,159 +200,11 @@ export async function getCharFromEvent(
   let keyEventCodes: string[] = [];
 
   if (layout.type === "ansi") {
-    keyEventCodes = [
-      "Backquote",
-      "Digit1",
-      "Digit2",
-      "Digit3",
-      "Digit4",
-      "Digit5",
-      "Digit6",
-      "Digit7",
-      "Digit8",
-      "Digit9",
-      "Digit0",
-      "Minus",
-      "Equal",
-      "KeyQ",
-      "KeyW",
-      "KeyE",
-      "KeyR",
-      "KeyT",
-      "KeyY",
-      "KeyU",
-      "KeyI",
-      "KeyO",
-      "KeyP",
-      "BracketLeft",
-      "BracketRight",
-      "Backslash",
-      "KeyA",
-      "KeyS",
-      "KeyD",
-      "KeyF",
-      "KeyG",
-      "KeyH",
-      "KeyJ",
-      "KeyK",
-      "KeyL",
-      "Semicolon",
-      "Quote",
-      "KeyZ",
-      "KeyX",
-      "KeyC",
-      "KeyV",
-      "KeyB",
-      "KeyN",
-      "KeyM",
-      "Comma",
-      "Period",
-      "Slash",
-      "Space",
-    ];
+    keyEventCodes = ANSI_KEYCODES;
   } else if (layout.type === "iso") {
-    keyEventCodes = [
-      "Backquote",
-      "Digit1",
-      "Digit2",
-      "Digit3",
-      "Digit4",
-      "Digit5",
-      "Digit6",
-      "Digit7",
-      "Digit8",
-      "Digit9",
-      "Digit0",
-      "Minus",
-      "Equal",
-      "KeyQ",
-      "KeyW",
-      "KeyE",
-      "KeyR",
-      "KeyT",
-      "KeyY",
-      "KeyU",
-      "KeyI",
-      "KeyO",
-      "KeyP",
-      "BracketLeft",
-      "BracketRight",
-      "KeyA",
-      "KeyS",
-      "KeyD",
-      "KeyF",
-      "KeyG",
-      "KeyH",
-      "KeyJ",
-      "KeyK",
-      "KeyL",
-      "Semicolon",
-      "Quote",
-      "Backslash",
-      "IntlBackslash",
-      "KeyZ",
-      "KeyX",
-      "KeyC",
-      "KeyV",
-      "KeyB",
-      "KeyN",
-      "KeyM",
-      "Comma",
-      "Period",
-      "Slash",
-      "Space",
-    ];
+    keyEventCodes = ISO_KEYCODES;
   } else if (layout.type === "matrix") {
-    keyEventCodes = [
-      "Backquote",
-      "Digit1",
-      "Digit2",
-      "Digit3",
-      "Digit4",
-      "Digit5",
-      "Digit6",
-      "Digit7",
-      "Digit8",
-      "Digit9",
-      "Digit0",
-      "Minus",
-      "Equal",
-      "KeyQ",
-      "KeyW",
-      "KeyE",
-      "KeyR",
-      "KeyT",
-      "KeyY",
-      "KeyU",
-      "KeyI",
-      "KeyO",
-      "KeyP",
-      "BracketLeft",
-      "BracketRight",
-      "Backslash",
-      "KeyA",
-      "KeyS",
-      "KeyD",
-      "KeyF",
-      "KeyG",
-      "KeyH",
-      "KeyJ",
-      "KeyK",
-      "KeyL",
-      "Semicolon",
-      "Quote",
-      "KeyZ",
-      "KeyX",
-      "KeyC",
-      "KeyV",
-      "KeyB",
-      "KeyN",
-      "KeyM",
-      "Comma",
-      "Period",
-      "Slash",
-      "Space",
-    ];
+    keyEventCodes = MATRIX_KEYCODES;
   }
 
   if (!keyEventCodes.includes(event.code)) {
@@ -226,6 +238,10 @@ export async function getCharFromEvent(
   }
 }
 
+export function mayEmulateChar(event: KeyboardEvent): boolean {
+  return EMULATED_KEY_CODES.has(event.code) || event.code.startsWith("Numpad");
+}
+
 export function updateAltGrState(event: KeyboardEvent): void {
   const shouldHandleLeftAlt =
     event.code === "AltLeft" && navigator.userAgent.includes("Mac");