Our establishment opened about 2.5 years ago. There are several departments but ours was the only one established with english as the work language. I became head of this department about a year ago when the previous department head left.
No we have a new boss (naturally very swiss) who suddenly wants to change the language overnight. Not in 6 months or 12 months, but now. I can speak the language well enough and write basic reports, but to redo processes, forms and training modules is well beyond my current capabilities.

And because I work in a niche industry, I am f***ed.

I think the only thing I can look forward to is perhaps getting some good german language study in whilst I spend the next 12 months trying to find a job.