Denglish is actually the term used by linguists, mainly based in Germany, to describe incorrect English as spoken by Germans whose sole contact with English is at school. It results in something that might in some case sound English but in fact is not or is used in a differnet sense than in normal English usage. Modern German features an over-use of loan words, particularly from English. Germans mistakenly think the expressions/words are correct as they use them.
Bodybag - a new Denglish word for a fashionable bag, worn over the shoulder
Last, not least - an expression used by Germans in the sense of "last, but not least"
Walking - a sport now parcticed frequently in Germany - should of course be "power walking"