Please Help Me!!! My users can't post messages

This sounds like the javascript file for the editor is failing to load correctly.

Javascript is very strict and when you translated the language file to Spanish, you probably placed a character somewhere in the text used within the javascript that isn't liked.

Things like ' need to be escaped in Javascript using \' placing the \ in from escapes the character.

To help track down what piece of text is coursing the issue, download and run the Firefox web browser, it comes with a Javascript Console in the tools menu that should give you an accurate error message to find the course of the problem.