tiene casi 20 años y ya está cansado de soñar

(he's almost 20 and he's already tired of dreaming)

pero tras la frontera está su hogar, su mundo y su ciudad 

(but at the other side of the border lies his home, his world, and his town)

piensa que la alambrada sólo es un trozo de metal 

(he believes the wire fence is just a piece of metal)

algo que nunca puede detener sus ansias de volar 

(something which can never stop his eager to flyyyyyyyy)

 [bad word] el sol cuando amanece 

(free like the sun when it rises)

yo soy [bad word] el mar 

(I am free like the sea)

 [bad word] el ave que escapó de su prisión y puede al fin volar 

(free like the bird that escaped its prison and can at last fly)

 [bad word] el viento que recoge mi lamento y mi pesar 

(free like the wind that records [bad word] and my woes)

camino sin cesar detrás de la verdad 

(I walk without stopping behind the [bad word] 

y sabré lo que es al fin la libertad 

(and I'll know at last what freedom is)

con su amor por bandera se marchó cantando una canción 

(with his love as a flag he left, singing a song)

marchaba tan feliz que no escuchó la voz que le llamó 

(he went so happy, that he did not hear the voice calling him)

y tendido en el suelo se quedó, sonriendo y sin hablar 

(and lying down on the floor he remained, smiling and without talking)

sobre su pecho flores carmesí brotaban sin cesar 

(on his chest (a certain kind of flower) blossomed non-stop)
 [bad word]  I think it means he got shot when crossing the wire fence)

libre... (same as before)