i vote against translating any console output. console output (of any program, not just mangos) should *always* be in english, so that you can just copy&paste it and everybody will understand it. if you run into a problem and post your log here, we can understand it. if you have a translated version, we won't.
the best example is visual studio: it always has translated versions, so if someone posts his VS-error-logs here, we don't understand them. but VS does it good too: they have error-codes. so you just have to search for those error-codes on MSDN and you'll find the english version of the error. it just takes more time.