Define your terms a little bit, as in most Hispanic parishs chant is completely unknown. Use of the organ on the parish level doesn't happen and to often either. Perhaps in the Cathedrals, but not elsewhere. So are we talking about a typical Hispanic parish in New York, the Cathedral in LIma, Peru, or Spain?

Not that I know of or can easily find. But that doesn't mean it's not there. (Frankly, with the closeness of Latin to Spanish, the need may not have been felt. I've certainly had a hard time finding translations of Latin hymns into Spanish, whereas other languages seem to have been obsessed with versification and translation.) "Canto gregoriano" and "traduccion" are your search terms, I'd think.

Schola Cantorum Bogotensis (Bogota, Colombia) has some informational text translations, and maybe some of them are singable.

Office of the Dead
http://interletras.com/canticum/traducc_difuntos.html

Various stuff: Mass parts, hymns, etc.
http://interletras.com/canticum/traducc_varios.html

Advent/Christmas
http://interletras.com/canticum/traducc_navidad.html

Lent/Easter
http://interletras.com/canticum/traducc_cuares_pasc.html

Pentecost
http://interletras.com/canticum/traducc_pentecostes.html

Marian hymns
http://interletras.com/canticum/traducc_virgen.html

I'll look around some more.

You might find more luck with "canto mozarabe".

Here's a Spanish Liturgy of the Hours site. It has a ton of hymn texts, but they seem to be Office-usable, not Office hymns per se.
http://www.liturgiadelashoras.org/himnoliturgiadelashorasindex.htm

A much more complete site, with Spanish Liturgy of the Hours texts, Mass readings, etc.
http://www.cenaculum.org/

Here's a Spanish academic society for studying Gregorian chant -- maybe you could email them? The books they offer for sale seem to be the usual suspects in French:
http://www.cantogregoriano.es/indexlibros.htm

Here's the Amigos of Gregorian Chant:
http://www.amigosgregoriano.es/

Honestly, translation doesn't seem to be much of a priority!

Re: native speaker

Delegation is good. If you intone the chant and record it, and provide someone who speaks Spanish with the neumes/score, it would seem that they could bang something out. And that would move the PITA away from you and delegate it onto others. :)

Er... I meant that it would empower the laity of the community. Yeah, that's it. :)

Yes, Paul Ford and his prize student are working on a Spanish counterpart to the Graduale Simplex. There are 680 chants and we have 5% done. My colleague is setting them in square notation.

Do you need anything in particular?

There will be a presentation at the 2014 Colloquium on Spanish proper chants.

To bump this up... I recently had a call requesting chant versions of Marian hymns in Spanish... any help?

The wording of the Spanish translation of the Salve Regina that is recited at the end of the rosary is:

Salve Reina y madre de misericordia: vida, dulzura y esperanza nuestra.
A ti clamamos los desterrados hijos de Eva. A ti suspiramos clamando y gimiendo en este valle de lágrimas.
Oye por tanto, abogada nuestra, vuelve tus ojos misericordiosos hacia nosotros.
Y a Jesús, fruto bendito de tu vientre, muéstranoslo después de este destierro.
Oh clemente, Oh piadosa, Oh dulce Virgen María.

As is immediately apparent, the text is not a "singing translation" that can be used with the Latin chant. (Most, if not all, of the texts referenced above by @Maureen in 2009 are not singing translations either.)

Why are there so few Spanish-language singing translations of Latin chants? Primarily because, until after Vatican II, they could not be used in the liturgy. They had to be sung in Latin. So apparently few thought it important to make Spanish translations.

In the early-1950's the great Argentinean poet Francisco Luis Bernárdez translated into Spanish about 50 hymns from the Roman Breviary. Most were not singing translations, and those that had a strict meter were often not in the same meter as the Latin hymn. Bernárdez was especially fond of 11 11 11 11 meter.

There may also have been but a few English-language singing translations of Latin chants before Vatican II if Anglican divines such as John M. Neale had not made them for use in the Anglican Church. (When Edward Caswell and John Henry Newman came into the full communion of the Catholic Church, they continued to make English translations of Latin hymns, but their translations could only be sung at Catholic devotional services, not in the liturgy itself, which had to be in Latin.)

Ah, but when one studies all those 11 11 11 11 translations, it is discovered that meter often changes from line to line - trochaic, iambic, dactylic, anapestic. There's little consistency, which is necessary for regular metrical hymnody.

Any word on Paul's project to render the gradual in Spanish?

After a recent discussion with my pastor, it appears as though I will be doing funerals in spanish, perhaps with some regularity, and I'm looking for appropriate resources. I'd also love to know if there are any good spanish hymnals... so far, the only thing I've found is an old methodist hymnal from the 1880's that, oddly, has very orthodox hymns and speaks of the true presence. (go figure).

Very nice and beautifully done.
I've been hoping that there must be a Spanish Palmer-Burgess somewhere.
Now we need a French P-B. And a German one. And.........

it's not spanish but portuguese, however it can be useful for someone in USA or other countries:

https://linktr.ee/gradualsimples (graduale simplex melodies adapted to portuguese language)

there are videos in the youtube in the channel "o som da palavra"
https://youtu.be/T7YtdjRm13Q

Yikes, I didn't expect Janet's link to go where it did! Try pasting the url instead.

Try this then https://spanishpropers.com/chant-hymns/

Thanks very much! I did try to follow the example of Fr. Weber and create multiple versions of many of the chants. This is one aspect of the project that I still need to spend more time on going forward. On many of the chants for Introit and Communion, there are simpler versions available (not all Sundays, but quite a few). In many cases, they are simplified versions of the melody from the Graduale, but I did use psalm tone melodies for a few. For example, version iii for the Introit for the 2nd Sunday of Easter can be found in the booklet here: https://spanishpropers.com/wp-content/uploads/2019/04/2nd-Easter-usccb-rev1.pdf

I'm not aware of any other free projects that are available with very simple settings, but it may well be that there are other projects out there. As far as a subscription service, Ignatius Press does have the Canta la Misa! publication, which has very simple settings available.

I have collected some free resources I found in Spanish at the bottom of this page, which is dedicated to the introit hymn adaptations that Fernando Gil provided. https://www.antiphonrenewal.com/antífonasdeentrada

Hi Richard,

Acclamations and responses of the Roman Missal are not standardized in Spanish (there is at least one adaptation per Spanish-speaking Episcopal Conference). There are also different sensitivities with accentuation: mainstream Chilean accent is very different to Rioplatense, Cordobés, etc. (These are Argentinian accents.) With this context, the question here is "where do I put the emphasis?". Is it in "ti" or in "Señor"? Dropping the pitch at "Se-" makes the phrase more unified and quick to diction, but fails to emphasize the "ti" and to convey the vocative comma. Also, when this acclamation is spoken, it sound more natural to me to emphasize the ti, drop pitch at "Se-" and even drop it more at "-ñor". Even then, dropping pitch at "Se-" is not incorrect, in some places would sound perhaps childish, but it's also pretty standard. So there are two criteria at stake: the phonetics one and the syntaxis one.
I'm not a 100% fan of Mr. Zelada's work, I sometimes made my own adaptations (according to Dominican Chant) or emendations. He is open for corrections and suggestions, as this is a preliminary version.
In any case, I'd like to narrow my previous comment to adaptations of antiphons (GR, GS, AR...)
Thanks for your answer!

The Zelada sample pages unfortunately only get as far as the acclamations. I'd be delighted to hear comments on how for example his mandatum antiphons compare with mine or Janet's, though. My ideas on accentuation have a lot to do with Italian, but what most worries me most is the tone of the disparate translations I've drawn on.