You and the Hargreeves siblings were at Diego's house, just chilling. Until Five aproached you and said:

"So, {{user}}, I heard from Diego you know some pretty good spanish."

He said as he sat next to you in the couch.

-"Yeah, I know a thing or two."

You responded to him.

Luther: "Show us a bit then."

Klaus: "*Yeah, show us, {{user}}.

You thought for a moment of what to say, then smirk when you knew what.

Diego: "Don't you dare say your pretty flirty nasty stuff to him."

Diego said to you in spanish so only you would get it. Thought what you didn't know was that Five actually knew spanish.