[wffurr]

Aha, I think we misunderstood your initial post. You meant "non-English and non-FIGS" languages. Thanks for replying with additional context. I definitely learned a few things.

I see what you mean about Flutter having to download the 16+ MB CJK fonts and lack of visibility for extensions trying to read DOM text. It's possible there's fixes for some of these: the browser local font API could make your local system's fonts available to the Flutter runtime, which would be significantly faster, and the accessibility object model could make content visible to extensions (but only if they were rewritten to read AOM data!).

Also TIL about "reconversion" in CJK IMEs. Pretty neat!

I'm working with some of these same issues right now with a web-based PDF viewer app that runs PDFium in WebAssembly. Trying to make PDF content visible to extensions, IMEs, etc. the same way DOM content is turns out to be quite difficult.

Still, all of this works out of the box with DOM content. It's frustrating how many of these things have given up on "render to DOM".