Website and non-english languages in user profile


in my account settings the language is set to german (de)
Very often when I’m logged in the website I just see the top-navigation of the page, but the rest of the page remains blank.

I did now track the problem to the URL building used.

For example when I’m logged in and click on the “API” button it takes me to this URL:

the correct URL would be:

Could you please make sure I don’t have always to manually correct the url’s to be able to navigate the vaadin site ?