25 can't be enough, Kazakh has 9 phonemic vowels. I presume the six Latin vowel signs will still get diacritics?
To ensure fullness of the Kazakh language sound system, the scientists included 8 digraphs,
[...]
The scientists rejected the idea of introducing diacritical marksI don't see any vowel ones
I also only see four digraphs, for consonants only.
It looks like U is replacing У-with-a-line, and W (!) is replacing У
see chart with three rows for other vowel sounds