ı tried duolingo. it is a useful application for vacaboulry but ı think you cant learn a langueage with duolingo.
Yes, I have personally used Duolingo for learning French. It's undeniably addictive, but I believe you cannot become fluent with Duolingo.
The main reason for this limitation is the lack of emphasis on speaking practice, a crucial component for achieving fluency. Duolingo falls short in providing good opportunities for speaking practice.
If your objective is fluency, it's essential to engage in regular speaking sessions with language exchange partners or tutors.
Two decent platforms for finding language exchange partners or tutors are italki.com and Tandem (which is more of a mobile app than a website). These platforms offer opportunities to practice speaking and you will improve your language skills quickly.
I have used Duolingo and I don’t think it’s the best app to become fluent. The Internet site I am having the most success with is something called speaking club that I joined, and I think that is the best way to become fluent in the Polish language.