ankou...just guessing, but I assume that you were employed by an American, French or English company who would be responsible for the financial aspects of travel and healthcare.......in other words the Saudi Government would be clear of any financial encumbrances brought on by the arrival of your wife and kids.
Can we say the same for this Indian situation?
No, in your situation, it would not be necessarily for your wife or kids to learn to speak Arabic, particularly as, again i assume, that you would be living in a Western compound, all English speaking.
From a language point of view, this Indian gentleman should be allowed immigration into the UK.....but once here ......who looks after him?