Ménbāzú yǒu zìjǐ de yǔyán, dàn méiyǒu chuántǒng wénzì.
The Monba have their own language but no traditional writing system.
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culture
Population is small (around 10,000 in China). Their name 门 (mén, door/gate) refers to 门隅 (Monyul), the historical region they inhabit on the southern slopes of the Himalayas.