Learning a new natural language

So the main question I’m currently asking myself is how much foreign language can you absorb in 10 days?

Have no clue, but I’m sure I’ll find out.

Googled a little, found a nifty tool called DuoLingo.
They state that it is possible to gain language skill level of one semestar using their tool.
The Research paper can be found here (https://www.duolingo.com/research).

Will definitely try that out and track my progress here on a daily base.