Hoskh/Sandbox

Vowels
There are also pharyngealized vowels.

Unconditioned vowel breaking:

[ɪː] -> [aɪ̯]

[ʏː] -> [aʏ̯] (or possibly [ɔʏ̯])

[ʊː] -> [aʊ̯]

[oː] -> [uo̯]

[ɛː] -> [εɪ̯]

[œː] -> [œʏ̯]

[ɔː] -> [ɔa̯]

[æː] -> [eə̯]

Umlaut:

i-umlaut:

[u] -> [y]

[ʊ] -> [ʏ]

[o] -> [ø]

[ɔ] -> [œ]

[a] -> [æ]

[aʊ̯] -> [aʏ̯] (or possibly [ɔʏ̯])

[uo̯] -> [yø̯]

[ɔa̯] -> [œa̯]

The rest are unchanged due to already being front.

u-umlaut:

[i] -> [y]

[ɪ] -> [ʏ]

[e] -> [ø]

[ɛ] -> [œ]

[æ] -> [œ]

[a] -> [ɔ] (if [ɔʏ̯] instead of [aʏ̯], else [a] -> [œ])

[εɪ̯] -> [œʏ̯]

[eə̯] -> [øɵ̯]

[aʊ̯] -> [ɔʊ̯]

[aɪ̯] -> [ɔʏ̯]

The rest are unchanged due to already being rounded.

a-umlaut:

[i] -> [e]

[y] -> [ø]

[ɪ] -> [ɛ]

[ʏ] -> [œ]

[ɛ] -> [a]

[e] -> [æ]

[o] -> [ɔ] (probably?)

[u] -> [o]

[ʊ] -> [ɔ]

[aɪ̯] -> [aɛ̯]

[aʏ̯] -> [aœ̯] or (probably) [ɔʏ̯] -> [ɔœ̯] (wow, such a weird horizontal diphthong...)

[uo̯] -> [oa̯], merges to [ɔa̯]

[εɪ̯] -> [aɛ̯]

[œʏ̯] -> [œː]

[eə̯] -> [æɐ̯]

Hopefully that's all and I don't need to umlaut those any further...

Vowel reduction:  Only short lax vowels can appear in unstressed syllables, with secondary stress counting as stress. The vowels that can appear in unstressed syllables are / ɐ  ɵ   ɔ  ə ɪ ʏ ʊ/  < a ö o e i ü u>.