Recovering American 

An American who has been living in another country long enough to understand that/why the people in that country feel antipathy toward Americans, and is modifying their behaviour/educating themselves to overcome those deficiencies.

From the phrase "recovering alcoholic".

No, it's all right, you can invite Crandall to Grandpère's birthday: he's a recovering American.

Recovering American by Matti! Matti! Matti! January 4, 2011