If DLC text is missing, check the data folder for a file named local_ru_fix_loc.pack (or similar language fixes) and delete it, as these often overwrite newer English patches.
Installation & compatibility
You need to obtain the specific English data files, which typically total about 2 GB. The required files are: local_en.pack local_en_2.pack local_en_gc.pack total war attila english language files codex patched