Do you by "main menu" by any change refer to the control panel=main window?
If so, it is a matter of a skin which has "hard coded" text labels.
Try a different skin (e.g. Base skin).
With respect to the subs I really have no idea (other than that a wrong subs-file is used).
If you're referring to on-line subs: did you define "Default subtitle language(s)" under Options > Preferences > Subtitles [Subtitle properties]?
Maybe the (3) subs-providers have no subs in arabic for your movies?
Could you please explain with a bit more details?