Not as good as Google’s thing, it’s a pain to use. “namaste” (नमस्ते) comes out as “naa-maa-saw-tae”(नामासते), and that’s the least inaccurate example

I don’t just want character substitution.

It’s for an Indic language. I want it to be so when I type in “namaste”, it types it out correctly as: नमस्ते I want it to be offline.

(afaik this is readily available on android devices using google’s input software)

Thanks, exactly what I needed

I’m not that good at English, so I had no idea what to call it. You can’t search for something if you don’t know what it’s called. My results pointed to other unrelated stuff (It gave me tutorials on how to make text bold, italic, etc).

privacy-enhancing technologies

Ahh yes, of course!