It seems to be a little bug in the input parser. You have to take care while translating the generic.php file. Dont translate the strings that belongs to markup strings such color or quote. If you translate these the parser runs in trouble and display these strings in the posting without using it.

There is another problem with the language files. You must take care that after the closing > no more characters follows. No whitespaces, no cr/lf. Example: if you do this to admin/login.php and enter the control panel you will recive an error on top (header already send).