Ts–ch merger
In phonology, the ts–ch merger is the merger of the voiceless alveolar affricate and the voiceless postalveolar affricate.
In Russian, it is the merger of the consonants rendered by letters Che and Tse. If the shift is towards Tse, it is called tsokanye ; the shift towards Che is called chokanye.
It is a regular sound change of Lower Sorbian, but not Upper Sorbian, as seen in the difference between Lower Sorbian the merger is part of a more general dialectal feature called Mazurzenie present in many Polish dialects, named for the Masovian dialect.
It also occurs in a few areas of the Chakavian dialect of Serbo-Croatian, known as tsakavism.
The sabesdiker losn feature of Northeastern Yiddish includes the merger.
