Pinyin is a Grassfields language spoken by some 27,000 people in the Northwest Region of Cameroon.
Sequences are: All noun and verb roots begin with a consonant; initial vowels are necessarily prefixes.
Long vowels are written double: aa, əə, ii, ‿ɨɨ, oo, uu.
Diphthongs ie, iə, ʉə, ɨə, uə take a single tone.
Tones are high, mid, low, rising, falling.