native language support important for customer care also,
if you dont translate your device to turkish language one day someone can use that device for tdiffeernt purpose, and if it had some damage, than Turkish law authorities can give responsibility to producer. becouse people can say "i dont understand but they sold us an english language device. thats why i didnt know that i did smth wrong"

Turkish language is necessary imo, Turkey is great market for nokia also other mobile device manifacturers