Well it seems is quite common but since it has not been solved, here it goes another thread.
I used to play in Spanish but, due to every mod works in english, I tried to go back to English for my game... and it ignores all the configuration I have made.
- Steam is in english
- I have change the game language throw the properties
- I have re-install Rome 2 and Attile having change my "main" language, the server it tooks to download
- I have remove the "local_en.pack" and "local_en_shared_rome2.pack" and check the integrity of the game
Please, fix it.