"Bei England und English wird von vielen Sprechern nach dem
Ringlaut ein zusätzliches g gesprochen. " - "vielen"? The "ng" is pronounced /ŋg/ in "England" and "English": I don't believe there is any kind of English where it is pronounced only as /ŋ/.
The -ng sound at the end of words is pronounced differently in different parts of Britain:
"Just as bag comprises three sounds, [bæg], so equally does bang, [bæŋ]. But it was not always so. Until perhaps about 1600, everyone pronounced words of this kind with a plosive, a [g]-sound, after the nasal: [bæŋg]. And of course you can still hear this pronunciation in Birmingham, Stoke, Manchester, Liverpool and even in Sheffield (though not, I think, in Leeds and Bradford). The innovation of NG coalescence, the change whereby the two letters ng came to correspond to one sound rather than two at the end of a word, was a historical sound change that was resisted in these mostly western parts of the midlands and north, although it caught on everywhere else. ... Note also what happens when a suffix is attached to a stem ending in historical ng. If we take the word singer, one who sings, we see that for most of us the stem-final [g] was lost just as in sing itself. But in finger, on the other hand, where the [g] is in the middle of a stem, it remains. Hence for most speakers singer [ˈsɪŋə] and finger [ˈfɪŋgə] do not rhyme. But in the local speech of Liverpool and Manchester they do, because in [ˈsɪŋgə] we get just the same sequence as in [ˈfɪŋgə]. The same thing applies if we compare kingly with singly, which rhyme in Manchester but not in London or Los Angeles" http://www.phon.ucl.ac.uk/home/wells/yorksdia...