Big problem with forum charset and ????? chars (Spanish forum)

[Rafa-el]

Hello,

I have a problem with one forum, I wll detail what I do:

First, the forum was ok but the language phrases in the forum spanish language are outdated so I update the language uploading a language with the correct forum charset UTF-8

So, after this language update the characters like áéíóñ, etc., are looking like this: ������ in the language phrases like log in, forum, etc.

So, I upload a ISO language coded and the problem was on the forum and thread content because the language phrases are good but the forum is messed up.

Currently I have deleted all the áé chars but I want to solve this problem, I try several times using different methods but nothing solve it so, Any Idea???