A very specific request!

Drop both .pack files into the \data\ folder.

To change the language to English in Total War: Attila (specifically for the CODEX release), you must acquire the necessary

Missing Text: If menus show "----------" or are empty, ensure no leftover fix packs (like local_ru_fix_loc.pack) are still in the Data folder, as these can cause collisions.

Step-by-Step Guide to Editing the Codex