Travieso translates to "mischievous" or "naughty". It's a fun and playful word that adds a bit of spice to the lyrics.
In the song, the lyrics say, "A ti te encanta verme travieso" (You love to see me mischievous). It suggests a playful, flirtatious dynamic between the singer and the person they're addressing, hinting at a bit of playful trouble or teasing. It's a more unique and engaging word than common adjectives.
Wisin spends "El Proceso" asking for exactly one thing: don't rush it. The hook says it outright: "Ven pégate, bebé, disfruta el proceso" [Come here, baby, enjoy the process], and everything else in the song makes the case for why that's worth doing. He's blunt about what he wants: "'Toy puesto pa' ti y quiero robarte un beso" [I'm all in for you and I want to steal a kiss from you]. He's even blunter about the effect she has on him: "Tú tiene' un flow que a mí me mata, es que me mata" [You've got a flow that kills me, it really kills me].
By the time he reaches "Con pasión, de corazón" [With passion, from the heart] and "Mientras perreamos esta canción" [While we grind to this song], the song has stopped pitching and started narrating the dance floor itself. The outro plays out like a DJ credit-check over the final beat, naming Los Legendarios and El Químico before the track cuts out.