Thanks for the feedback! I would be happy to add support for other languages - it looks like the text-to-speech engine that I'm using supports 4 other languages (Spanish, French, German, Italian) and so all I would need is translations of the existing English phrases into those languages. Are you able to provide a translation for one or more of those languages?
For reference, here are the strings that are currently used:
* SMS code delivery: "Your Kontalk verify code: [code]"
* call code delivery: "Your Kontalk verification code is [code]"
* call code expiry: "Your Kontalk verification code has expired. Please try again."
* call error (rare): "Your Kontalk code is unavailable. Please try again."
Please feel free to send me the translations here or by private message (or point people at the JMP group chat to discuss the translations there: https://firstname.lastname@example.org ).
I'm also open to hearing what the right language would be to use for certain countries - some may be straight-forward (France, Germany), while with others I don't know for sure which is the right default language to use (Switzerland, Belgium). I'd be happy to hear from people familiar with the language customs in different countries about which languages might be best to use.
I can add support for languages beyond the above 5 to the SMS code delivery messages as well, and perhaps even the spoken text (if I can find people willing to record the messages and the numbers 0 through 9 in their native language). Feel free to reply here or private message me if you can do that or know someone who can.
In the long run, https://jmp.chat/ itself will support more languages, but since we currently only offer US and Canadian phone numbers, there probably aren't a lot of people using it or likely to use it who don't speak English. If you are willing to translate the main page, though, we'd be quite happy to work with you on that.