How does the vowel system of Chechen differ from those of many other Caucasian languages?

The vowel system of Chechen, a member of the Nakh languages, is notably more intricate than those found in many other Caucasian languages. While many Caucasian languages feature a limited set of cardinal vowels—often numbering around five—or even fewer, such as the Abkhazo-Adyghian languages which may rely on only one or two distinctive vowels, Chechen possesses a highly developed system.12

In Chechen, the number of distinctive vowels reaches approximately 30, a count that includes diphthongs and triphthongs. This complexity follows a general phonological pattern observed across the region: languages with a strongly developed vowel system, such as Chechen, Ingush, and Dido, typically maintain a comparatively simple consonant system. Conversely, languages with complex consonantism, such as Avar, Lak, and Dargin, tend to feature relatively simple vowel systems.1