[poly2it]

This? https://alicecengal.github.io/uuid-hangul/

[wincy]

Telling Siri to pronounce the output there is absolutely wild, I may not speak Korean but can tell it’s outputting unpronounceable nonsense.

[chabska]

I tried using Google translate's voiceover, it seems fine? I don't have an iPhone so I can't compare with Siri. It is obviously a nonsensical string of ten characters, but all hangeul characters should be pronouncible.