 But there is a consensus amongst linguists that the Pamiri languages are East Iranian, a sub-group of Iranian languages while Tajik language which is Persian is included in Southwestern Iranian, another sub-group of Iranian languages.In the 1926 and 1937 Soviet censuses Rushani, Shugni and Wakhis were counted as separate nationalities.After 1937 these groups were required to register as Tajiks.