Everything would work the same way as current, except you could also specify the language in the chunk header (in the unused byte), rather than as a comment.
For example 0 could be Lua, 1 Javascrip…
I've had the idea to maybe set up a github org (demoscene-rs for example could work) and move this repo to there, it would also allow for other repo's that relate to demo's written in/with rust