Harshen Fer, kuma Dam Fer ko Fertit, ɗaya daga cikin harsuna da yawa da ake kira Kara ("Kara na Birao"), harshen Sudan ta Tsakiya ne wanda wasu mutane dubu biyar ke magana a arewacin Jamhuriyar Afirka ta Tsakiya kusa da kan iyakokin Sudan da Chadi, a cikin yankin da aka sani da Dar Runga.[1]
Yayin da Ethnologue ya bar shi ba a rarraba shi ba, yana da alama yaren Bongo – Bagirmi ne a cikin dangin Sudan ta Tsakiya (Lionel Bender, Pascal Boyeldieu); [2] Roger Blench ya rarraba "Fer" a matsayin Bagirmi, amma "Kara na Birao" a matsayin ɗayan ɗayan. Harsunan Kara masu alaƙa.
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