Can You Become Fluent With Duolingo?
Duolingo can aid in your journey to become fluent, but if you aren't actively practicing the language with a native speaker or practicing your comprehension skills by listening to native conversations, then you will not become fluent.
How long does it take to become fluent in Duolingo?
Those first thousand words are going to be the hardest in some ways, but that is where Duolingo is strongest. Two months at 10–20 minutes per day would be ideal. Once you get to 1000 words of passive vocabulary, you will also be maintaining those words, and making most of them truly active.
How long will it take to become 'fluent' in another language using ... - Quora
It's a waste of time. In fact, it's just as bad as the education system Von Ahn criticizes. Duolingo outsources its translation services, allowing for awkward sentences to slip in undetected. And translation (the core of its platform) is already widely known to be an ineffective way to learn a language.
Does Duolingo Work? The Truth About This "Free" App | OptiLingo