This however completely undermines any of the good cultural exports that McDonald's has done. McDonald's has fired an employee in Israel for speaking Arabic to a fellow Arabic-speaking employee.
Alright- if you want to declare one language as the official "workplace" language- that's good, and needed. But hey, when it comes to "water-cooler" conversations, people should be free to use whatever language they please. It's a step too far- and as bedlammessiah points out- it's on par with firing people for speaking Spanish in state-side McDonalnd's.