If nothing works, the string table is truly corrupted.
If you want to avoid a full reinstallation, you can manually force the language strings through the Windows Registry. : Backup your registry before making changes. Windows Key + R , and hit Enter. Navigate to: HKEY_LOCAL_MACHINE\SOFTWARE\Maxis\The Sims 4 WOW6432Node\Maxis\The Sims 4 on some systems). Find the file named Right-click it, select , and change the value to your desired language code (e.g., for English, for French). 3. Fixing Missing or " How To Change Language in Sims 4 on EA App 6 Jun 2024 — sims 4 language strings fix
These symptoms indicate that the game engine cannot resolve a string ID to a localized UTF-16 entry. If nothing works, the string table is truly corrupted