Julia Lyrics in English by Dani Martin
Maltrataré comes from the verb maltratar, meaning "to mistreat" or "to abuse." The future tense and reflexive pronoun me indicate that the singer is vowing to mistreat himself.
In the context of the song, after a breakup, the singer expresses a deep sense of self-blame and despair. He sings, "Me llegaré a ofender y me maltrataré" (I will get to the point of offending myself and I will mistreat myself), highlighting the emotional pain and self-punishment he anticipates feeling as a result of the separation.
Julia is packing up and leaving, and Dani Martin turns the moving boxes into a breakup inventory: "En una va la piel, la otra puede arder" (In one goes the skin, the other can burn) — some things get carried out carefully, some get burned. Through the chorus he keeps repeating the same question, "Cómo se ve el mundo desde tus pies?" (How does the world look from your feet?), which sounds like curiosity but plays like an apology he can't say straight.
What sells it is how specific he gets. "El viaje a Londres, tus CDs, aquel concierto de Green Day" (The trip to London, your CDs, that Green Day concert) — nothing symbolic, just the actual contents of a life together. By the second verse he's calling what's left "otro cadáver que esconder" (another corpse to hide), which is a blunt way to describe a breakup, and he backs it up: "Me enterraré con esa mierda que en este tiempo acumulé" (I'll bury myself with that sh*t I piled up in this time).
