Honestly, I don't know how well you could learn and become fluent in a language in 9 weeks. It's one thing to learn a few phrases, but to be actually fluent in 9 weeks? That just doesn't seem realistic for the vast majority of the population. Your brain can only absorb so much material in a day and it needs sleep to process and store the information it learned that day.
ETA: I'm all for changing how we learn foreign languages! I really do not like the memorizing index cards which is how I was taught in high school and college decades ago. I didn't really learning anything. When I took Spanish at UMPI, I didn't learn the same way. I had to write essays and a paper along with a verbal assignment. Definitely wasn't easy. I don't think I really learned or retained much. I also completed the course in a few weeks. I'm not conversing with someone using the language all day long either. I haven't used Spanish since the day I submitted my final assignments. So that probably has impact too - actually using the language.
ETA: I'm all for changing how we learn foreign languages! I really do not like the memorizing index cards which is how I was taught in high school and college decades ago. I didn't really learning anything. When I took Spanish at UMPI, I didn't learn the same way. I had to write essays and a paper along with a verbal assignment. Definitely wasn't easy. I don't think I really learned or retained much. I also completed the course in a few weeks. I'm not conversing with someone using the language all day long either. I haven't used Spanish since the day I submitted my final assignments. So that probably has impact too - actually using the language.
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