[jonp888]

I have eaten in Restaurants and and shopped in shops in Berlin where at least some of the staff were unable to speak even the very basic German needed to take an order or inform the customer of the price. This seemingly wasn't considered a reason not to employ them. As another example, there are plenty, perhaps even the majority of Yoga studios that work in English only.

It's probably going too far to call it an "enclave", but I don't think any of this would happen in any other German city.