he i ▁Village ▁ 白 <0xE9> <0xBB> <0x91> 村 ▁and ▁G ant ian zh ai ▁ <0xE7> <0x94> <0x98> 田 <0xE5> <0xAF> <0xA8> ) ▁Y uan ji ang ▁County ▁ 元 江 县 : ▁D ash u ip ing ▁Township ▁ 大 水 平 乡 ▁( in ▁Ga oz hai ▁ 高 <0xE5> <0xAF> <0xA8> ▁and ▁Yang ma he ▁ <0xE5> <0x85> <0xBB> 马 河 ) ▁ ▁Writing ▁system ▁ ▁The ▁Tai ▁Dam ▁language ▁has ▁its ▁own ▁system ▁of ▁writing , ▁called ▁Tai ▁V iet , ▁which ▁consists ▁of ▁ 3 1 ▁con son ants ▁and ▁ 1 4 ▁v ow els . ▁Although ▁the ▁language ▁is ▁t onal , ▁there ▁are ▁no ▁tone ▁markers , ▁as ▁there ▁are ▁in ▁Th ai ▁and ▁La o . ▁According ▁to ▁Th ai ▁authors , ▁the ▁writing ▁system ▁is ▁probably ▁derived ▁from ▁the ▁old ▁Th ai ▁writing ▁of ▁the ▁kingdom ▁of ▁Su k hot ai . ▁ ▁Unicode ▁ ▁Pro pos als ▁to ▁encode ▁Tai ▁V iet ▁script ▁in ▁Unicode ▁go ▁back ▁to ▁ 2 0 0 6 . ▁A ▁Unicode ▁sub comm ittee ▁review ed ▁a ▁February ▁ 6 , ▁ 2 0 0 7 ▁proposal ▁submitted ▁by ▁James ▁Br ase ▁of ▁S IL ▁International ▁for ▁what ▁was ▁then ▁called ▁T ay ▁V iet ▁script . ▁At ▁the ▁ISO / IE C ▁J TC 1 / SC 2 / W G 2 ▁meeting ▁on ▁April ▁ 2 4 , ▁ 2 0 0 7 , ▁a ▁re vised ▁proposal ▁for ▁the ▁script , ▁now ▁known