Apparently they've already been incorporating it and it's very inaccurate. I've decided to stop using them and have switched to LingoDeer and MemRise. Really pleased with how much better they are.
I started out with memrise, as it was very accessible and I wanted to start learning Japanese. It was fun but it's also very limiting. A mixture of Smouldering Durtles, Human Japanese and Ankidroid really accelerated things. And then the ginormous post-covid upswing in my industry came, with less colleagues than before and my brain got fried. Still trying to recover from that with therapy and whatnot. Yeah, I lost a lot of progress that way.
Any who, that was specific to learning Japanese. Wishing you success with your endeavors! Learning other languages is a huge Eye-opener for understanding other cultures better.
I can also recommend Pimsleur. A bit more expensive, but features more traditional style courses, while offering a lot of what Duolingo has. Plus actual topics with grammar, not just random words!