The Mongolian Cyrillic alphabet has 12 vowel letters: А, Е, Ё, И, О, Ө, У, Ү, Ы, Э, Ю, Я. A defining feature of Mongolian phonology is vowel harmony [3]: back vowels and front vowels do not mix within native words.
The two vowels unique to Mongolian Cyrillic — Ө and Ү — represent front rounded sounds absent from Russian. The State Language Commission [1] standardises their use in official Mongolian orthography and education.
Mongolian has 21 consonant letters in Cyrillic, following the Russian consonant set. Mongolian phonology uses the letters Х for the velar fricative /x/ and Ж for the voiced postalveolar fricative /dʒ/ [3].
The National University of Mongolia [2] documents the Mongolian consonant system in the context of its broader Mongolic family, comparing it with Classical Mongolian and the other Mongolic languages. The State Language Commission [1] sets the rules for consonant spelling in modern written Mongolian.
The letters Ө and Ү are unique to Mongolian Cyrillic [1]. The hard sign Ъ and soft sign Ь are used as in Russian, separating and palatalising consonants respectively.
The State Language Commission of Mongolia [1] regulates the standard use of all special characters in Mongolian Cyrillic, ensuring they are correctly represented in official documents, publishing and digital media.
Mongolian uses Arabic numerals (0–9). Native Mongolian number words: тэг (0), нэг (1), хоёр (2), гурав (3), дөрөв (4), тав (5), зургаа (6), долоо (7), найм (8), ес (9).
The word дөрөв (four) illustrates Mongolian vowel harmony [3] — the front vowel Ө determines that Ө also appears in the suffix. The National University of Mongolia [2] documents Mongolian numeral vocabulary in its Mongolic comparative studies.
The complete 35-letter Mongolian Cyrillic alphabet in alphabetical order. Ө follows О and Ү follows У, reflecting their phonological relationship as front rounded counterparts.
The State Language Commission of Mongolia [1], the National University of Mongolia [2] and the WALS database [3] collectively document and standardise the Mongolian Cyrillic alphabet in all its modern uses.
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