Re:ROI on a college degree depends what you study, not where
by emodendroket on Wednesday May 04, 2016 @01:20PM
(#11629896)
You don't need formal training in anything to practice it unless there is some sort of licensure scheme.
Nonetheless, I have achieved a level of fluency and especially literacy in Mandarin that puts my Japanese of that time to shame and I have no formal credential backing it up.
You don't need formal classes to become fluent in a language. If you'd like to learn how some very successful language learners have done it, check out http://lingsprout.com/experts