What is the best language learning software to become fluent in any language?
The best and only answer to your question is that there isn’t any. You’ve asked to become fluent. If you mean what I think fluent means, then you’re expecting way too much from any software. Fluent takes years and years of speaking any language. I’m fluent (or very close) in spanish but I’ve been at it for 12 years having lived for 10 years in Mexico. Short of that experience, I’d have never even come close to being able to even think of the word “fluent.” The same would be true for any language. Anyone that tells you that they can fluently speak 3 languages must be at least 60 years old and have started their road to these languages just after leaving High School at the very latest. No software in this wold will make you fluent. That’s a ridiculous idea but there still are those comercials out there that will tell you that they can. Don’t be so duped as to believe that crap. You have to pick one language and become obsessive about it. That’s the only way you can ever hope to learn one