Tested site_verify for google on site http://www.ofoifa.belgium.be/ - the "html-file" insertion method breaks because the file is placed under /nl/xxxxx.html, and when google requests without the /nl/ there's a redirect to the language selection page.

When using the meta-tag, the problem is essentially the same, with the meta-tag being rendered on /nl/ and /fr/ but not on the first rendered language-selection page http://www.ofoifa.belgium.be/language_selection?destination=%3Cfront%3E

I'll hardcode the solution into the language selection template for ofoifa as a quick workaround, but this will affect our other sites too if and when they wish to use the Google Webmaster Tools for any reason.