It's a good idea to post in English because the majority of people on these boards speak English and therefore, you can be answered quickly. I don't know if anyone speaks German (?) on these boards, so you might not ever be answered unless you post in English!
If you're requesting a multi-lingual mIRC FAQ there have been numerous posts regarding translations of mIRC, the help file and the FAQ - Try using the
Search feature with English search terms - Expand to 'All Forums' and 'All Posts' for best results. You can then get an idea of what everyone elses opinion is.
Regards,