Obviously in English, you can say stuff like "My German is terrible," or equivalent. But how is it in German? Is the following expression "correct"?
Mein Deutsch ist gut / schlecht / verbessert sich noch / usw.
(I realize that in this sense, the word "Deutsch" is synonymous with the word "Deutschkenntnis". So another way to phrase this question would be: can the word "Deutschkenntnis" be shortened to "Deutsch" in written as well as spoken German?)
