Yep...and so are ewoks, watto, the neomodians...
Star Wars is our world "redux".
I don't want to get into detail about who's a sterotype of what at risk of offending anyone.
SW is also full of other analogies about ideologies and constructs in our world...Look at the Imperials..."Stormtroopers" + Vader's helmet = Nazi-sim.
It's also a mish mash of Eastern mysticism, Greek Mythology, etc...oh yeah, and Lord of the Rings is in there for good measure too!
But yes, Ja Ja is a sterotype...it's what Lucas does. Check out "George Lucas in Love" to see why his films have struck such a chord with audiences.