A language map might be a nice addition, but it shouldn't be the only way to select a language. Usability includes access for the blind, and the software they use can read lists--something that said "Deutsch, English, Espanol, Francais" would work, but a clickable map won't. (Pardon the lack of accents, please.)
My suggestion called for a map AND text links.. here's a wack looking diagram of how it might look:
[English|Espanol|Francais|Deutch....] --------------------------- | | THIS IS A MAP :-) | --------------------------- [English|Espanol|Francais|Deutch....]
and ideally should be compact enough to be displayed without scrolling at all