Caveat Orator

Ryskind reports from the front:  
Rosetta Stone makes me sound like a sissy. I'm working with Iraqis. Aside from liking them right off the bat, I was glad because I wanted to try out all the Arabic I've been practicing. I have on-line certificates, people! I made them laugh because my usage is so formal I sound prissier than an Eaton student in a Bronx school-yard.... 
That reminds me of my high-school buddy whose cousins laughed at him when he went to visit them because his "perfect" Italian was laced with idiomatic expressions from the 1940s (when last his parents lived in Italy). It would be like someone coming up to you now and saying, "23 skidoo."