His English is probably enough to get by day-to-day but nowhere near enough to conduct affairs of state in an official capacity.

That's how they say it in the EU parliament. Even if you can talk in English you should just talk in your native language and get interpreted by supposedly best of the best interpreters

His English is way better than you'd think. In fact I think when he attended that embarrassing meeting with the U.S. a few years ago he had to interrupt the translator once or twice to correct them while they were trying to relay his statements in English. I wish I could remember the exact meeting.