One that has exactly the letters that can appear in a passport's machine-readable field.
I have lots of funny accented characters in my name, and I have lived in several countries under several different names adjusted to the local officials' keyboards. And don't even get me started on forms saying "your name exactly as in your passport, but also without any funny letters".
If there is a realistic chance of writing Kazakh (names) in 7-bit-ASCII-only letters, they should go for it.
They could also use two different but equally valid writing systems. Norway has two different official written languages that both sort of correspond to the same spoken language. AFAIR in former Yugoslavia both Latin and Cyrillic were written, I remember a friend telling me that in school they alternated between Latin and Cyrillic weeks.
-As for the two written Norwegian languages, they both utilize the same letters and are, by and large, more like two different accents than distinct languages.
One (Bokmål) is loosely based on Danish (language of the ruling elite up until 1814), adapted to resemble the way Norwegians for the most part spoke, while the other (Nynorsk) was pretty much based on rural dialects.
Nynorsk does make (slightly!) more use of diacritics than bokmål, but most current nynorsk users skip them in daily correspondence; their use is not mandatory. ('too', for instance, being written 'også' in bokmål and 'ôg' in nynorsk.)
Also, both versions of Norwegian uses our funny letters æ/Æ (ae, similar-sounding to a in 'bad'), ø/Ø (oe, similar-sounding to ea in 'heard') and å/Å (aa, similar to 'a' in saw).
Disclaimer: I am an engineer, not a linguist. There are probably some inaccuracies in the above, but it should get you through the next linguist pub quiz without causing embarrassment.
Yes, in YU they used both. It was localized to member states tho. Croatia used mostly Latin, and Serbs used mostly Cyrillic. They often were able to read and write both non the less.
One that has exactly the letters that can appear in a passport's machine-readable field.
I have lots of funny accented characters in my name, and I have lived in several countries under several different names adjusted to the local officials' keyboards. And don't even get me started on forms saying "your name exactly as in your passport, but also without any funny letters".
If there is a realistic chance of writing Kazakh (names) in 7-bit-ASCII-only letters, they should go for it.
They could also use two different but equally valid writing systems. Norway has two different official written languages that both sort of correspond to the same spoken language. AFAIR in former Yugoslavia both Latin and Cyrillic were written, I remember a friend telling me that in school they alternated between Latin and Cyrillic weeks.