system
Given the following post, respond as if you're commenting on Reddit:
human
[Star Wars (Canon or Legends)] How advanced are the Ewoks elsewhere?

C3PO, on understanding the Ewok language: "They're using a very primitive 
dialect."

This means there's a "less primitive" dialect. How advanced are we talking? Are they industrial age? Space faring? Are there groups that have joined galactic society as a whole?
gpt
They've been known to the wider galaxy for, at minimum, nearly four thousand years, per Legends (one appears as a player companion in SWTOR, the MMO set three hundred years after *Knights of the Old Republic*). They're still primitive creatures, no space flight of their own and very obviously not industrial on their own either.

(Un)fortunately, they were not really used much in Legends surprisingly enough, so we can't actually say if groups of them went out to join the galaxy at large. We do know that in both continuities more went out into the galaxy after the Battle of Endor, either helping the fledgling New Republic in various ways or going independent and doing their own thing.