Happens with many multi-lingual popoli.
My ex fiancée's mom would mingle Viennese German and English fairly often.
Grammar habits from a native language will often inject themselves as well.
Want to sound like Russian speaking English not quite skillfully? Drop articles. Immediately you have heavy Pottsylvania accent. Russian, and many related Slavic languages, don't have articles.
Goes the other way, too sometimes. Have been dropping subject pronouns frequently since studying Italian 9 years ago.