▁sounds ▁( e . g . ▁r ▁and ▁r ̃ ▁with ▁l ▁and ▁l ̃ ). ▁The ▁reader ▁is ▁referred ▁to ▁the ▁individual ▁languages ▁for ▁an ▁over view ▁of ▁their ▁ph on eme ▁invent ory . ▁ ▁No ▁G be ▁language ▁exhib its ▁all ▁of ▁the ▁above ▁forty - two ▁ph on etic ▁segments . ▁According ▁to ▁Cap o ▁( 1 9 9 1 ), ▁all ▁of ▁them ▁have ▁the ▁following ▁twenty - three ▁con son ants ▁in ▁common : ▁b , ▁m , ▁t , ▁d , ▁ <0xC9> <0x96> , ▁n , ▁k , ▁g , ▁k p , ▁g b , ▁ ɲ , ▁f , ▁v , ▁s , ▁z , ▁ χ , ▁ ʁ , ▁r , ▁r ̃ , ▁l , ▁l ̃ , ▁y , ▁w . ▁ ▁V ow els ▁The ▁following ▁v ow els ▁are ▁found ▁in ▁G be ▁languages : ▁ ▁In ▁general , ▁each ▁G be ▁variety ▁makes ▁use ▁of ▁a ▁subset ▁of ▁twelve ▁v ow els , ▁seven ▁or al ▁and ▁five ▁nas al ised . ▁The ▁v ow els ▁ ▁are ▁att ested ▁in ▁all ▁G be ▁languages . ▁ ▁Nas al ization ▁plays ▁an ▁important ▁role ▁in ▁the ▁v owel ▁invent ory : ▁every ▁v owel ▁in ▁the ▁G be ▁languages ▁occurs ▁in ▁a ▁non - nas al ized ▁and ▁a ▁nas al ized ▁form . ▁Cap o ▁( 1 9 9 1 ) ▁obser ves ▁that ▁the ▁degree ▁of ▁nas ality ▁of ▁nas al ▁v ow els