Speaking a different language changes personality

Yes, the interesting thought that speaking another language will change your personality.

Like this very nice Czech proverb explains:

Kolik jazyků znáš, tolikrát jsi člověkem.
You live a new life for every new language you speak.
If you know only one language, you live only once.
(Czech proverb) Source: Omniglot

Learning a language really can change your life and your outlook on the world. Adding some culture and some new words to your brain as well. Better yet, according to a recent study it seems that bilingual people have a personality change when they slip into a different language. Although I have no idea how you measure personality by what language one speaks it at least makes sense in a translation sort of sense. That is if you've got the words to be complain, moan, and whine it's likely you will. Whereas speaking another tongue, as your second language, no matter how well you speak it is likely to invoke a more thoughtful speech process than the flippant tone of your native tongue. Some interesting research, but then again I may also be misconstruing some of its findings to an extent. Whatever the case you can read the article about "How switching language can change your personality" right on over at New Scientist.