Using notes seems like a lot of extra overhead. Why not just do an auth token initially so you only need to sign once.
Otherwise if you're using an extension or something you'll need to manually approve every translation
Damus translation service requests are authenticated by nostr notes. This is a simple way to make authenticated requests, no api keys needed.
$ curl -d @<(nostril --sec $jb55sec --content '{"source":"JA","target":"EN","q":"こんにちはwill"}') https://api.damus.io/translate
{"text":"Hi will"}
It also caches translation results: translation_id = sha2(q+source+target)
So they can be looked up again without calling deepl.
This is all open source as well if you want to make your own caching deepl translator:
Discussion
no extension needed here. This is for damus/native clients
Still signing can be an expensive action
Creating a few notes isn’t going to kill perf
Although sleeping on it, verifying all those sigs might have performance issues when there are lots of requests. One thing I could do is return a token on first use that subsequent requests could use instead 🤔
Will make that optimization later though because im lazy.