średnio zaawansowany in inglese:

I passed intermediate level of French in school.

my english is intermediate

I attend a German course for intermediate students

The negotiations will continue as soon as we find an intermediate

Łukasz is an intermediate student of English.

If you are intermediate, you should know this very well

Intermediate and advanced language courses are given in the language being learned.

When the lights are red all vehicles must stop, and they may not start until they turn to green. Amber is the intermediate colour.