Based on what I learned from the answers I got to my previous question, I wrote on a German site
Mein schreibendes Deutsch
to translate into English the sentence in the title:
The German that I write.
But a native speaker, not knowing what I am trying to find out, corrected my original sentence into
Mein schriftliches Deutsch.
But this actually means
My written [recorded] German.
So it's not the same as
The German that I write.
Having said all that, is my original sentence, Mein schreibendes Deutsch, correct, especially in light of the grammatical knowledge that I got from the answers to my previous question?