By Dana Rose Falcone
Updated October 02, 2015 at 12:38 PM EDT

Stephen Colbert invited YouTube comedian Felix Kjellberg, better known as PewDiePie, onto The Late ShowThursday night. Since PewDiePie has had such success online, Colbert was unsure whether the Swedish star was familiar with television at all.

“Welcome to television,” Colbert said. “This is a steam-powered medium that runs on coal that your grandparents invented.”

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PewDiePie admitted he usually “unplugs” when it comes to watching TV, and then taught the late-night host some curse words from his native Sweden. “Helvetica, that’s a font on Microsoft Word!” Colbert remarked after PewDiePie revealed the favored sans serif as a swear word overseas.

Check out the full clip above.


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