Your maths are correct if the brit only wants to work in UK.
If he fancies a job elsewhere in Europe's free employment zone, mine are.
Totally wrong my dear ARKROYAL, to work as a contractor anywhere in EU the only language required is English.
For example: Canadian and Australian working for TAT (France) back in 1990, myself working last year in Italy and not able to speak a single world of Italian, than offered a job in Portugal without speaking the language either, same with friends working for VBird, Macedonia, Wizzair, etc...
in all these cases we French had to learn English, a Brit would have had nothing to do.
Now if you are talking about joining one of the Flag carrier EU nationals or Brits are at the same point, they need to know the language of that state... end of story.