Depending on your platform, the severity of the restriction varies. Here is the breakdown of fixes for PC vs. Consoles.
If you are trying to change the language for a of the game (like a retail disc or a modified version), let me know so I can provide the exact file names you need. If you'd like to narrow down the problem, tell me: the evil within english language pack
If Steam or Epic does not offer English, you likely have a restricted region copy. You will need to locate the game's configuration files to change the language manually. Depending on your platform, the severity of the
If your menus display blank lines or weird code fragments like ui_menu_start_notfound , your strings_en.str file is missing or corrupted. Re-download a clean copy of the English string tables and place them inside the base\generated\ directory. Conclusion If you are trying to change the language