diff --git a/src/simulator/src/i18n.js b/src/simulator/src/i18n.js
deleted file mode 100644
index 602f4c51..00000000
--- a/src/simulator/src/i18n.js
+++ /dev/null
@@ -1,17 +0,0 @@
-import Banana from 'banana-i18n'
-
-const banana = new Banana()
-banana.setLocale(window.locale)
-const { locale } = banana
-const finalFallback = 'en'
-// object with default language preloaded
-const messages = {
-    [finalFallback]: require(`./i18n/${finalFallback}.json`),
-}
-try {
-    messages[locale] = require(`./i18n/${locale}.json`)
-} catch (err) {
-    // If Asynchronous loading for current locale failed, load default locale
-}
-banana.load(messages)
-export default banana
diff --git a/src/simulator/src/i18n.ts b/src/simulator/src/i18n.ts
new file mode 100644
index 00000000..0dea0e04
--- /dev/null
+++ b/src/simulator/src/i18n.ts
@@ -0,0 +1,26 @@
+import Banana from 'banana-i18n'
+
+// Ensure `window.locale` is typed (you can extend Window interface if needed)
+const userLocale = (window as any).locale as string || 'en'
+
+const banana = new Banana()
+banana.setLocale(userLocale)
+
+const locale = banana.locale
+const finalFallback = 'en'
+
+// Load default (fallback) messages
+const messages: Record<string, any> = {
+  [finalFallback]: require(`./i18n/${finalFallback}.json`),
+}
+
+// Try to load user's locale file
+try {
+  messages[locale] = require(`./i18n/${locale}.json`)
+} catch (err) {
+  console.warn(`Could not load locale file for ${locale}, falling back to ${finalFallback}.`)
+}
+
+banana.load(messages)
+
+export default banana