I had German in school for a total of six years and this had a side effect of giving me the ability to read a newspaper in Norwegian with a rough understanding what the text was about.
When I began German in school (at around age 13, iirc), the fact that I had already learned Swedish as a child (due to family roots) gave me a noticeable head start over the rest of the class. Many German words that would have been completely foreign to me as an English speaker were immediately understandable through Swedish.
Your claim is literally absurd.
http://www.learn-norwegian.net/pronunciation/pronunciation.h...
Unless you're trying to say that several characters have different phonetic bindings than they do in English. This is true of most languages that use a variant the Roman alphabet as does English.