flemish
n.
A Dutch dialect spoken in parts of Belgium. Native speakers are often plagued by questions such as "What's Flemish?", "I like your accent, is it German?", and "Phlegm? Ewwww."

adj.
Relating to those poor sods who speak Flemish.
"I speak English, but Flemish was my first language."
"Fle-what?"
"Never mind. I speak English. Only English."

"I'm Flemish"
"I'm sorry."