How do I switch the dictionary? While I am typing this almost any word is underlined red and alternatives in a weird language are given. Forgive me if it is the language you speak normaly. It is of course not weird. Just for me. Thank you.
You mean in Firefox? Right-click on the input area and select Languages and you'll find a list of languages that have already been added plus an option Add Dictionaries... to select others.
By the way, have you configured Sabayon Linux for your locale? If not, see the post Re: hello all! Questions, here =) for how to do it.