Unicode's transliteration rules are Turing-complete

At this point it feels more difficult to ensure that your format cannot compute than to ensure it can

reminds me of Word's autocorrect being turing-complete https://www.youtube.com/watch?v=jlX_pThh7z8 (3:57, but whole video is fun)

I've been wondering for a while if anything in Unicode could accidentally compute. It turns out that UTS #35 transliteration rules are Turing-complete. I show how to compute Collatz with just 3 rewrite rules running on stock ICU.

Does it work on modern OS or just PyICU ?

Waiting for someone to vibe a compiler targeting Unicode transliteration rules...