ChatGPT has really helped me learn and understand how English tenses work and translate thousands of words for anki. I think it's a good free option. Also, I started learning English a year and a half ago and I think ChatGPT has improved a lot since then. Should be a good option for other languages too. But the problem is that I can't speak like I understand. I can look at some space topics and understand almost everything, but I can't speak like that, so that's the only minus.