What is the common language of Chitral and Ghizer district?

What is the common language of Chitral and Ghizer district?

ضلع چترال اور غذر کی مشترکہ زبان کیا ہے؟
Explanation

Khowar is the lingua franca of Chitral.

It is also spoken in the Gupis-Yasin and Ghizer districts of Gilgit-Baltistan.

As well in the Upper Swat district.

Sheena is a local language of Gilgit Baltistan.