Interesting news. I hope that Unicode will accommodate this change effectively. There have for instance been some issues with the unicode encoding of the similar Uyghur script. One thing to note is that Mongolia does not use standard Cyrillic - they use a variant that has a few differences in letters and accents. https://en.wikipedia.org/wiki/Mongolian_Cyrillic_alphabet I once learned this the hard way while trying to help a Mongolian person navigate the bus system of Los Angeles in the era before ubiquitous smartphones.