fix lang

Author: dmaximyuk

src/vars/app.ts

@@ -1,6 +1,8 @@
-export const LANG = (localStorage.getItem("lang") ||
-  navigator.language ||
-  "en") as string | undefined;
+export const LANG = (
+  (localStorage.getItem("lang") || navigator.language || "en") as
+    | string
+    | undefined
+)?.slice(0, 2);
 
 export const THEME = (localStorage.getItem("theme") || "light") as
   | "dark"