Sadly there's no "You know that you're Romanian if" yet.
But the rest are nice, such as..
Icelandic: You have never heard of Magnus Magnusson, despite him being the most famous Icelander, you eat rhubarb jam with beef while soup is considered a dessert.
Turkish: You have at least once carried sugar cubes, blessed with prayers at a mosque, as a lucky charm to an exam and believe that yoghurt is the magical cure for every disease.
Spanish: You call all your cereal "con flay" and any sneaker "tenis."
Finnish: Silence is fun.