Altaic languages

The Altaic languages exhibit two kinds of sound
harmony affecting the vowels and velar stops. In palatal vowel
harmony, all the vowels of a given word are back or they are all front; further, front velar consonants /k g/ occur only with front vowels and back (deep) velars /q g/ only with back vowels. Exceptions are allowed in certain compounds and borrowings. The Manchu-Tungus languages have...