In my experience Google Meet, Zoom, Skype, Microsoft Teams, and other basic platforms are not optimal for online language learning. A great platform should function as a virtual classroom, and unfortunately these apps fall short in one area or another.
In all of my years of online teaching, I have found that
ClassIn is the best teaching app for language learning speficially. I have used it for almost three years now in my Spanish and ESL tuition sessions.
It's an "all-in-one" learning environment which supports multi-interactive teaching with a huge variety of interactive tools, such as an in-class and out-of-class chatroom, a customisable whiteboard, a dedicated homework area, the class schedule, previous class recordings, and a section with all the class resources and materials.
If you are curious about this app, check out this
short introduction from the company.