@clarkej @saurabh6790
My problem is fixed, and this is how i fixed it,
I checked perl locals settings and found out that there is no arabic local ar-utf-8 setting in iy, i added it to the en-utf-8 and tried backup again, and it worked for all files
Thanks guys, but did not think that the solution would be that simple 
Hope it would help other guys if they face same error but with other languages
i used this lilnk to change perl locals so thought i would help other people on how to do it