User:Ghoti/English is not German

When we speak a language we always use the phonemes of that language, even if we are saying loanwords. For example, wiener in English is /ˈwiːnər/ and not [ˈviːnə] (besides, in German it would be Wiener, with capital W). Similarly laptop in German is pronounced ['lɛptɔp] and not (similar but different vowels). This is more obvious in words that share a common origin. For example wolf is in English and  in German, and practically nobody uses the German pronunciation when speaking in English or the other way around.

If you speak German you should remember that English is not German, particularly in names of cities, movies, and concepts that don't exist in English (such as bratwurst). This works also when using English names or concepts in German, like when you say Die Homepage pronounced [diː 'hoːmpeːtʃ].

Best shot
Ideally a word should have the best possible adaptation, but not better. For example, a reasonable adaptation of the word Müsli (English "muesli") is The correct German pronunciation [ˈmyːsli] sounds artificial and should not be used in an English conversation. Since is the recognized pronunciation (along with ), a better approximation, as is  is not recommended.

Distorted words
Sometimes words are distorted, either because their pronunciation is difficult or because they are pronounced according to different rules (e.g., spelling pronunciation). For example, the word "wiener" in German has an initial /v/ and in English it is pronounced with /w/.