Long story short:

I'm failing what I'm learning now and it seems unlikely I'll work my way back up.
So I'm considering going into arts and taking a dickload of language classes

I'm already familiar with several languages, albeit not fluent. I learn them in my spare time. I'm illiterate in all the ones that dont use the english alphabet.
I'm thinking of leaving my current faculty (one of the more prestigious ones) and go into what's considered the lowest of the faculties, arts, and master the languages? From my experience, most language teacher's arent fluent, even if they are, they cant fucken teach, instead you rely on the book. Language classes were one of the worst classes I've taken during high school. I had to learn everything myself afterward. Does changine faculties sound like a good idea?

If so I'll most likely rely on the stuff I already know, which means even after taking those courses, I'll still probably be illiterate in the languages I know, or know barely any.

So what careers are available to a polyglot, one who cant read or write all the languages he knows? I was thinking of working as some kind of translator at the airport. Hmmm? If such a position exists, is it a lucrative one.

Languages I know

-English (fluent)
-French (fluent)
-Dutch (some)
-Spanish (some)
-German (some)
-Mandarin (kind of fluent & illiterate)
-Japanese (little & illiterate)

Currently working on Arabic, Russian, Italian.
Correct me if I'm wrong but I think im familiar with most of the top 10 common languages in the world.

Teacher is one of the obvious choices. Translator is another, for a government agency or international business. I don't know any salary.

The latter, translator sounds a lot lucrative than teaching. How would one go into such a career? I dont think getting hired by the government is that easy.

I believe i can pass for a teacher a lot easier than a government translator. They have to be very fluent and literate. With the exception of the 3 languages I am fluent in, I have a feeling everything I'm saying is that language's equivalent of engrish.

The reasons i stated airport translator in the former post is because, wtf is some immigrant going to do if i give them the wrong information? Complain to my boss with me translating for him?

Screwing up for an international business/goverment could put me in deep shit.