While this may be true, you will find quite a reasonable number of people who can speak non-English foreign languages quite well, and that excludes the foreign

While this may be true, you will find quite a reasonable number of people who can speak non-English foreign languages quite well, and that excludes the foreign nationals that come to live and work in the Netherlands as well. If you wanted to serve a largely German speaking clientele, then you could reasonably expect to get a decent number of applicants in the Netherlands in my experience, especially in the border regions. The kids here are still learning German and French in school, and while they might speak it less, there are still plenty that go there regularly.