From bfc2cec7d43eb8eaa46dd3f91084932381257059 Mon Sep 17 00:00:00 2001
From: kj_sh604
Date: Sun, 15 Mar 2026 16:19:35 -0400
Subject: refactor: excalidraw-app/

---
 excalidraw-app/app-language/LanguageList.tsx     | 25 ++++++++++++++++++++++++
 excalidraw-app/app-language/language-detector.ts | 25 ++++++++++++++++++++++++
 excalidraw-app/app-language/language-state.ts    | 15 ++++++++++++++
 3 files changed, 65 insertions(+)
 create mode 100644 excalidraw-app/app-language/LanguageList.tsx
 create mode 100644 excalidraw-app/app-language/language-detector.ts
 create mode 100644 excalidraw-app/app-language/language-state.ts

(limited to 'excalidraw-app/app-language')

diff --git a/excalidraw-app/app-language/LanguageList.tsx b/excalidraw-app/app-language/LanguageList.tsx
new file mode 100644
index 0000000..001d4ea
--- /dev/null
+++ b/excalidraw-app/app-language/LanguageList.tsx
@@ -0,0 +1,25 @@
+import React from "react";
+import { useI18n, languages } from "@excalidraw/excalidraw/i18n";
+import { useSetAtom } from "../app-jotai";
+import { appLangCodeAtom } from "./language-state";
+
+export const LanguageList = ({ style }: { style?: React.CSSProperties }) => {
+  const { t, langCode } = useI18n();
+  const setLangCode = useSetAtom(appLangCodeAtom);
+
+  return (
+    <select
+      className="dropdown-select dropdown-select__language"
+      onChange={({ target }) => setLangCode(target.value)}
+      value={langCode}
+      aria-label={t("buttons.selectLanguage")}
+      style={style}
+    >
+      {languages.map((lang) => (
+        <option key={lang.code} value={lang.code}>
+          {lang.label}
+        </option>
+      ))}
+    </select>
+  );
+};
diff --git a/excalidraw-app/app-language/language-detector.ts b/excalidraw-app/app-language/language-detector.ts
new file mode 100644
index 0000000..52da490
--- /dev/null
+++ b/excalidraw-app/app-language/language-detector.ts
@@ -0,0 +1,25 @@
+import LanguageDetector from "i18next-browser-languagedetector";
+import { defaultLang, languages } from "@excalidraw/excalidraw";
+
+export const languageDetector = new LanguageDetector();
+
+languageDetector.init({
+  languageUtils: {},
+});
+
+export const getPreferredLanguage = () => {
+  const detectedLanguages = languageDetector.detect();
+
+  const detectedLanguage = Array.isArray(detectedLanguages)
+    ? detectedLanguages[0]
+    : detectedLanguages;
+
+  const initialLanguage =
+    (detectedLanguage
+      ? // region code may not be defined if user uses generic preferred language
+        // (e.g. chinese vs instead of chinese-simplified)
+        languages.find((lang) => lang.code.startsWith(detectedLanguage))?.code
+      : null) || defaultLang.code;
+
+  return initialLanguage;
+};
diff --git a/excalidraw-app/app-language/language-state.ts b/excalidraw-app/app-language/language-state.ts
new file mode 100644
index 0000000..f491c22
--- /dev/null
+++ b/excalidraw-app/app-language/language-state.ts
@@ -0,0 +1,15 @@
+import { useEffect } from "react";
+import { atom, useAtom } from "../app-jotai";
+import { getPreferredLanguage, languageDetector } from "./language-detector";
+
+export const appLangCodeAtom = atom(getPreferredLanguage());
+
+export const useAppLangCode = () => {
+  const [langCode, setLangCode] = useAtom(appLangCodeAtom);
+
+  useEffect(() => {
+    languageDetector.cacheUserLanguage(langCode);
+  }, [langCode]);
+
+  return [langCode, setLangCode] as const;
+};
-- 
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