Most of the modifier letters should be respaced about spectral HOT 5 CLOSED

@mr-islam You may be interested in the link I shared in #13 (comment)

from spectral.

Do you have test text for those modifiers? Real-world use would be much appreciated.

from spectral.

Many of those are used in phonetic notations, a lot are withdrawn IPA symbols and some are non standard IPA. See The principles of the International Phonetic Association from 1921 for example, in particular the Chinese and Burmese specimen on page 30.

ˈ and ˌ are still current IPA symbols.

Skolt Sami sometimes uses the modifier letter prime 02B9 ʹ, or alternatively the ASCII acute 00B4 ´ or the modifier letter acute 02CA ˊ. See for example the Koltansaame page of the Encyclopaedia of Saami Culture which uses the modifier letter acute 02CA ˊ.

from spectral.

Thank you!

from spectral.

Another use case: when transcribing Arabic using Latin characters, O2BE and O2BF are considered standard substitutes for letters (ع and ء specifically) that do not exist in the Latin character set. See here and Wikipedia for a reference.

They are used like:

Hamza made wuḍūʾ, and then performed ʿasr prayer.

from spectral.