Lots of Flake8 corrections
Maybe we should change the rule to allow lines of 120 chars. It seems more usable.
Big twitter correction : now it outputs the words in right order...
Allow the user to select a language. It must be written in english, and capitalized, ie : English, French, German, Hungarian... (reverted from commit 829948b85df0510e331372bcd60cb31db9c96a5c)