There is also a category separated from the catch-all "other languages" (https://app.memrise.com/community/courses/english/other-language/) for "other Indo-European languages" (https://app.memrise.com/community/courses/english/indo-european-languages/). I'm now learning the Sinhala script for an upcoming trip to Sri Lanka (https://app.memrise.com/community/course/1922687/sinhl-sinhala-alphabet/) so I'd love to see it here 🥳!
Speaking of this, the above-mentioned "others" categories are quite a mess. I'd love to help create separate categories for individual languages (no matter how small) and develop a catalogue better than the current Memrise one, using geographical and genealogical classifications. For example, if I want to find a course for Sinhala, I can go "Asia > South Asia > Sri Lanka > Sinhala", or "Indo-European > Indo-Iranian > Indo-Aryan > Sinhala". These can appear in dedicated pages of maps and tree diagrams, instead of a simple picklist as it appears now on Memrise.
It would also be a great idea to develop a tagging system for courses. Two groups of tag options that I think of now are "script / words / phrases" and "beginner / intermediate / advanced". For instance, this course can be tagged "script, words, phrases, beginner", while this course can be tagged "words, beginner, intermediate".
Also, now that pictures are available here, maybe consider importing courses for sign languages (https://app.memrise.com/community/courses/english/sign-languages/) 😆.