Just switched to English and get basically the same error as shown in the original comment. So yes, it's also crashing in English.
Oh, I just found this (already closed) issue https://github.com/TerryCavanagh/diceydungeons.com/issues/873
paxed mentions on Aug 26, 2019 "This issue seems to be back, [...] Click on Play, you get to the cut scene with the jester, and when he tries to speak, kaboom." - which is exactly what I'm experiencing.
Also, cosmicchipsocket commented there that ...
I know the cause of this and it's because Lime's OpenAL is using SSE 4.1 instructions. If your CPU doesn't support them it will crash with an "illegal instruction" error.
https://en.wikipedia.org/wiki/SSE4#Supporting_CPUs
SSE4a does not count as SSE 4.1.
Maybe that helps tracking it down. It would fit the error messages & backtrace details?