Review: "Author Unknown"
I'm not sure that this is correct. I'm a native English speaker from Ireland. I learned French in highschool and by living in France, and German by living in Germany.
If anything, my style of speaking / writing in English is mirrored in both languages and my identity is even more obvious since it is not really how a native speaker would phrase things (although not necessarily incorrect).
On the other hand, my grammar in both languages is a mess, so maybe that wouldn't work -- it's a form of obfuscation.
Interesting article, though.