The "profanity" is a bit unprofessional but I guess since its propriatary they can do what they want *shrug*
The profanity would probably be more in comments of the code. Comments have zero funcationality to the actual program but only serve as to make comments on why a programmer did something in the manner they did.
It really depends on what language the programming language is in. If its in Assembly language the language is pretty cryptic and hard to read...
You have to remember there is possibly several hundred megs of text so finding the few bits of profanity would take quite some time unless you're looking for it specifically.