Thank you! And great suggestions!

I focussed first on European languages as I'm learning French. But I'll put some more effort in improving the Japanese experience since it seems to be very popular.

> but if there's an intention for bookmarking languages of interest for separate collections of videos & transcription exercises I can say I'd be happy to pay, honestly.

Would a language selection box at the top be enough? Or do you mean a more elaborate way to switch between languages?

For me, the main interest would be to switch the interface for one language to another in ideally 1-2 clicks; so if there was an interface element that captured the languages I was 'working on' that would be neat. Then I'd be happy to peruse the full list whenever curiosity spikes.

Otherwise, great work on a good use of existing technologies to provide meaningful educational benefit for yourself and others!