Working in Europe, I see a lot of programming code from non-English speakers.

One of my Italian colleagues let me in on one of their secrets:

"Wherever you see a variable named "pippo", there is an Italian developer."

 

From Wikipedia: 

Italian 

In information technology, especially in textbooks, a placeholder name for variables is pippo (Disney's Goofy); a second variable can be named pluto, and a third one topolino (Mickey Mouse). Oddly enough, names of characters from Duckburg are much less often used.