The Dutch love to practice their English. At the same time, ignore the requests, unless there is an urgent need to get the message across. Otherwise you'll be forever stuck. Another good trick - usually this won't work if people know your background - is to say you don't speak English, that way at least you get some time in, which is the biggest factor in learning another language.

And thank you for trying to learn the language of your destination, that alone should get you a lot of credit with the locals.