I mentioned it in Hal’s thread. When Kylo is faced against the Knights of Ren, in hals cut they call him a traitor I believe, but Kylo turns to look behind him towards the second group of knights, if whomever voiced the Knights of Ren could record them shouting the line “You’re too late, Solo” or “Give it up, Solo”.
It makes the name solo sound like an insult and a swear.