Ortografía means "spelling", a word you'd expect in a classroom, not a love song! This is what makes its use here so clever and unique.
In the lyrics, the singer says, "Hoy te escribo sin pensar y sin ortografía" (Today I write to you without thinking and without spelling). He uses this academic word to show he is so overcome with raw, unfiltered emotion that he's throwing the rules out the window. It's a beautiful metaphor for a love that's too passionate for perfect grammar.
This song from Colombian band Morat is all about that crazy, head-over-heels feeling of love at first sight. The singer sees someone and immediately feels "una mezcla de miedo con locura" (a mix of fear with madness). He knows right away that losing this person would be losing "la más grande fortuna" (the greatest fortune), even though he admits he knows nothing about them yet.
Instead of just being about the initial crush, the song focuses on the promise of what comes next. He doesn't claim to know how to love this person perfectly; instead, he promises to figure it out. He says, "Para aprender a quererte / Voy a estudiar cómo se cumplen tus sueños" (To learn to love you / I'm going to study how your dreams come true). It's a sweet and dedicated approach to love, promising to put in the work to understand his partner completely and give them a life with "más sumas que restas" (more additions than subtractions).