However, there is one college in the UK, and probably many others in Europe where ICAO Language levels can be improved upon without bigoted judgement, just an assessment of the facts.
For the record, the assesment is based upon spoken, not written, levels of competence.
Back to the question which Staraviator posed:
You would have to get a EEC recognised ATCO Licence, then, to work in the EEC, pass an assessment of prior competence in to prove yourself worthy of being able to work in that country.
The APC may lead to you being given dispensation for some of the ratings, or you having to do the whole course.
Its worth checking with each country's CAA.