1. You awake and groggily turn to your significant other and say, “Bonjour!”
2. When you are startled, scared, or absurdly angry you curse in said language. “Merde!”
3. You sing along to the most repetitive of songs. “Alors on danse” by Stromae http://youtu.be/7pKrVB5f2W0
4. You fight the urge to debate in said language because you’re better at arguing in it.
5. You fake an accent when you need to get out of a sidewalk survey.