IIRC, more people speak/read/write Klingon than Esperanto.
“huh, huh, huh, huh! Don't mind them, they always speak Klingon at conventions.”
And remember this young Star-fleet officer, the only Trekkie to ever get laid was Captain Kirk. ;)
We used to have a FReeper here who always had the niftiest Klingon sayings (with translations) in his tagline. K’Acknor, or something.