Its a shame that a simple button label would be the cause of an education tool to be rejected... sissy-state for the win!
Moreso, best to stick with terms that are acceptable to people of all cultures and backgrounds. The word 'fucking' may be a light-hearted slang to a 20 year old american, but it may just be offensive to someone older living in the UAE.
Professionalism, though not perfect, does in fact help in making people from various background agree and understand good ideas by being austere, simple and well-defined.