Khrvrvsnangnja. It's the oldest known language and it had only one word: Ho. However using different kinds of tone and facial expression / body posture it had over 50 meanings. Some examples:
Hoooooooooooooooooooo! = What the hell are you doing?
Ho? = Where are you headed? ( literary : where?)
Hoooooooo! = Oh my god, your boobs are amazing!
If you need a course in Khrvrvsnangnja, I can help you :)