Throwing error if site is a multilingual

Thank you! This is really a major bug.

@ivnish, attaching a patch for this issue.

Steps to merge the patch :-
1. Move to fasttoggle contrib folder (e.g. cd modules/contrib/fasttoggle)
2. Download the patch using wget
3. Apply the patch (e.g. git apply -v 3402086-4.patch)

Please validate & let me know if you found any discrepancies on it.

Automatically closed - issue fixed for 2 weeks with no activity.