"Weight of my star." Makes absolutely no sense in English. But I felt it was some form of that, that was correct, rather than "fame". So I figured, star, lucky star, luck, fortune, fate ... and "fate" rhymed with "weight" for a quick little internal rhyme. But I can see a parallel structure thing between the "fame" and the sense of separation, of being called away. Talk to me some more about that.

I'm also still working on that "lullaby" definition ... I still see this parallel structure thing going on between the "pain" definition and the "harm" spoken of in the refrain ... it still makes "lullaby" appear out-of-place to me. Besides the guitar playing, what else ties into this?

* 'First and second lines, "por si" means "in case/just in case".
Thank you. I wasn't able to track that one down. In the colloquial Spanish I learned long ago, I was never presented with that meaning. "Si" meant "if', or it meant "yes", or it was an appositive used for emphasis, or as part of the expression "ahora si" meaning "right now" and shortened to just "si" in common speech; I knew "acaso de" for "in case", but not "por si". The best I could come up with was "For now" or "By now". I don't care which language it is (none worse than Greek), I have problems with prepositions, so I dropped them & left the word "Now". Let me think about this & see how it affects the meaning.

* "... the street corner gossip dead in its tracks". Would you, please, put it into Spanish to know what it means?
I'm not sure I understand your request. "Put it into Spanish to know what it means" ... ummm ... Spanish is the original language. I'm not trying to be dense here (no trato de tener un cerebro de piedra), but I'm trying to put it into English to know what it means. The translation process went like this:

"Por matar los rumores de aquella esquina"

Por matar => for killing, by killing, to kill

los rumores => rumors, scuttlebutt, gossip (the actual speech & stories, not the person)

de aquella esquina => of that (street)corner

IOW, "to kill the streetcorner gossip". But gossip is not some heretofore undiscovered life form. quiere decir, "to kill ... gossip" would not mean to draw blood, but it WOULD mean euphemistically to stop it from occurring immediately & prevent it from ever happening again. The equivalent English phrase is "to stop *something* dead in its tracks", as if you had just shot an animal you were tracking right between the eyes.

Thus, "To stop the streetcorner gossip dead in its tracks"

But of course, if you don't have a problem with the specific line, I can see how this rendering might cause a problem of context or sequence for some people, but it is actually structured properly in English.

The verb "confesar" or in English "to confess" or "to admit" requires an object, quiere decir, you cannot just admit, you must admit *something*, which must be made explicit, even if only by a pronomial referent. It also carries a strong implication that you are admitting that particular something *to somebody*; this can be addressed by context if not done explicitly. It carries a weaker implication that there is a motive for your admission; this, too, can be addressed by context or by explicit statement. The sequence of that lyric block shows the following:

TO WHOM => "I'll tell you ... " (contextual)

ACTION => " ... I want to confess" (explicit)
OBJECT => "That I'm so in love" (explicit)
MOTIVE => "To stop the ... gossip ... " (explicit)
etc.

*Third stanza, last line Do you need the "it" at the end? (Same thing at the end of the song)
Yes. Again, "confess" takes an object, even if only the pronoun "it". "It" also has to have a prior explicit explanation, otherwise my usage would become the error known as "an unclear antecedent".

* Fourth stanza, first line, s.b. "Weather I am happy or sad"
I think the word you wanted here was "whether", meaning a choice between asserting and denying a single particular quality or condition. The word "weather" refers to rain, snow, cloudiness, temperature, etc., and I don't believe that that is what you meant. As you are presented a dual choice, i.e., happy / sad, the use of the word "whether" is problematic (debatable). That is why I chose the subjunctive mood instead, which carries the unstated "If ..." ("Si ... ") in its meaning. ("Were I ..." = "If I were ...", i.e. "Sea yo ... " = "Si yo sea ... ", similar to "Si yo sería").

*Sixth, third line, s.b. "For I owe life so many things"
In the context of the rest of this song, the line rendered that way means nothing to me:

"Que le debo a la vida tantas cosas"

"Que" => "what / for"

"le" => "of / to *him* / *thou*" (masculine singular, does not refer to anything feminine or plural)

"debo" => "I owe"

"a la vida" => "Life" (feminine singular -- "le" cannot refer to this)

"tantas cosas" => "(of / for) such / so many things" (feminine plural -- "le" cannot refer to this)

"For to him I owe Life for so many things" or
"For I owe him my life, for so many things,"

That really isn't much of a stretch.

"I am with Valeriu: "nana" is a lullaby."
from the webpage http://diccionario.reverso.net/espanol-ingles/nana . Understand that this "nana" is something this woman is confessing. Try each definition as the object of a confession. Then please note definition [3] :

nana
[1]
sf
1 (Mús) lullaby, cradlesong
2 (CAm, Méx) (=nodriza) wet nurse
(=niñera) nursemaid
3 (=pelele) Babygro ® , rompers pl
→ nano
101Traducción diccionario Collins Espanol - Ingles Sugerir nueva traducción/definición.

Collins
nana [2] sf
1 (=abuela) grandma * , granny *
→ año
2 (CAm) (=mamá) mum * , mom (EEUU) * , mummy * , mommy (EEUU) *
→ nano
101
Traducción diccionario Collins Espanol - Ingles Sugerir nueva traducción/definición.

Collins
nana [3]
* sf (Cono Sur) (=dolor) pain
→ nano
101
Traducción diccionario Collins Espanol - Ingles

Think about it. Can you or would you confess a lullaby? Would you confess having a wet nurse or nursemaid? Would you confess possessing diapers? Would you confess to having an abuelita (grandma) or a mommy? Are any of these shameful secrets that one might confess in a moment of weakness? Or do these questions themselves appear to mean something?

NO OF COURSE YOU CAN'T, YOU WOULDN'T, THEY AREN'T AND THEY DON'T.

But you COULD confess living with the unbearable pain of an undying love. And I think that THAT is what this song is about. Thank you for forcing me to be clear about these things.

posdata -- I dozed off while writing this, and dreamed a couple people were commenting on what I was writing. The first person said, "Hey, he doesn't back down, does he!" and the second one said, "No, and he doesn't get relevant, either." ... Oh well, I guess you had to be there ... :D

Vale has it right, "mother tongue" is a legitimate English usage meaning one's native language.

But I can't hold a candle to her Francisco. You?

I think I'm starting to see what you and Vale are talking about, but I don't yet fully understand it. Especially not enough to give it its due. This part of my rendering turned on the words "he cantado" (I've sung), but that is an error -- it says "he cantando" (I have here, or I beheld, singing; it doesn't translate well into English). Suggestions?