firra=n mane thwamnzrm mema zokwasi woga yara (.) fthé thwamnzrm kabe
firra=LOC which 2|3PL:SBJ:PST:DUR/dwell mema language man 3SG.MASC:PST:IPFV/be (.) when 2|3PL:SBJ:PST:DUR/dwell man
As for the ones who lived in Firra, they were speaker of Mema. That'a when the people lived in Firra.