Q: Digits are persian in keynote!

I already installed El capitan OS on my macbook Pro, and keynote had been upgraded through the app store. Am working on presentation in keynote which included some chart, the problem is in chart section. the digits are in persian but all others are in english, i tried to check the sections for the text items but th digits are still in persian, the picture in down will show the issue better i think. is there any solution to change the digits to english as well? kindly note this problem onlu happened in chart sections and other items the digits are OK.