"Acceptable"? Yes. Although for
their own comfort and ease of living, I would suggest that
anyone living in
any country long-term should be at least trying to learn the language. Not exactly fair to say they should just "be able to speak it". That **** takes time. I had a Greek friend at University and his English was "very basic"
at best when he first got here, and was only really becoming conversationally fluent by 3rd year. I have no idea how he was following his lectures
. Though he was an Engineering student so a lot of it is Maths, I guess, and he could always understand more than he could actually speak.