But Sundance And Cayde Don't Care At All About Cursing And Know Too Many Curses - Tumblr Posts

Out of the vanguard ghosts who we know, I see Sundance and Sagira both cursing. A lot lol. Though Sundance would probably be the worst of the two. But Sagira is a sass queen and would probably use curses for funsies.

Sundance taught Val how to swear

lol Val learned how to swear from his time as a Vagabond. He learned to develop better manners from Robby and Ikora. They're trying to get him to speak nicer to others.

BUT I can see Sundance being an enabler of sorts.