I'd go as far as to say such is a requirement.
Poles speak English well enough to eliminate the need to learn Polish for a two-week stay.
...as I've expatiated here on a number of occasions.
You are undermining your own point talking like this. Nobody says, "expatiated" and hopes to be understood by a minimum-wage girl serving lunch.
Quoting:
Expatiate in a Sentence:
A long-winded talker...
The congressman will expatiate for hours on the importance of educational spending.
If you want to converse with the locals and not make them roll their eyes, don't ever say, "expatiated".
How about: ...as I've often said here...
instead of :
...as I've expatiated here on a number of occasions.
just cut out that nonsense you only make a bigger fool of yourself ..
You know a better one? Spit it out...