This translation is a mixture of Quenya and Sindarin, but is mostly Quenya. I had to do much altering of words and some things don't make a lot of sense; but blame my dictionary as it doesn't have a very complete vocabulary (Maithr, it even left out his, he, him, when, with, etc...). I THINK it's pretty accurate...

Laer Boromir

Mí rér úi beleg cor
valeva echant nórë saur
a echant i eri vane ngwalme beleg
hin man echant i mor hir oiale nainië
i egla cor nant echant
i er, i mor, i beleg cor
i doresse quete atanieva Gondor
i hir, i vedui Denethor
echant Finduilasion. Denethor mele
er, o i esse o Boromir.
Denethor nendil Boromir
an Boromir ne dagornil;
Faramir ú-mele dagor.
Noldo ne Faramir.
Boromiron ar Faramiron esser quetar hi.
Boromir na boro mir.
Faramir, i noldo er,
ne o i esse o far mir.

Boromir ne vana o dhol,
ar o aiya. Ve o
Númenor, mor ne i fin o Boromir
o i sinda hen, o tinwë
mira hainesse. Thalion i diriel.
Boromir ne beleg macar.
Beleg aráto ne Boromir;
dagoresse Boromir ne i dacil.
O dagnir o ilye atani ne Boromiron-
i anir o val; ar orë ve nayes.
Boromir aniryes ú-ve thalion ve rom o waith;
er eth, yassen Boromir ú-mele Aragorn
nuva i aran o Gondor.
Oneyes Boromir beleg ngwalme.

Boromir ar Faramir ner lhaw oma
ú-nibin er. Queteyes o
nólë dolenello hin atani. Boromir
tire utuva i quettoyes.
Boromir nore palan.
Rivendellesse Boromir túle.
I oma quete
Imladrisesse ne
I iaur macil-ne-cirithe.
Omentielvoesse Boromir nuva i tehta
o i Pheriainon na tenn'diriel
ar ilye nuva utuva
Isilduron dagnir na tula,
I cor o Sauron, cuia, ú-firn.
Hi, Boromir quete omentielvoesse o Elrond,
ar túle i astaldo Frodo Baggins.
Hi Pheriain chebe i cor
ar er Frodo ú-ne.
Legolas Thranduilion, ernil, túle,
beleg cú boresse.
Ar i Dunedaín Aragorn túle;
i nogroth Gimli echant Frodo ve káno.
Ve Pheriain Frodo ne ver.
Neldë Pheriaini túle Hobbitonesse.
Samwise Gamgee, esse o Sam,
Samion er cheba i dor o waith.
Meriadoc Brandybuck, Pheriain o kal orë.
I esse o Meriadoc ne cir ve Merry.
Ar Pippin, o i esse o Peregrin Took,
Pheriain o i Shire.
Pippin khile Merry.
Hobbitonesse Merry ar Pippin oner ngwalme
i Pheriaini o Hobbiton, i mar o Pheriain.
Gandalf, i sinda, nuva tula ndu
mí dor mí hyarmen o Endor,
Mordor, dor o Sauron. Neyes gurthnië, ar
i lúve ne laita Gandalf i noldo,
adra quendo andor ar dara i lossë.
Ar Boromir, gayaesse o i cor,
túla ar khile.
Hi ne nuvar i umbar o i cor;
neyes undulavar i cor lhachesse.

Del beleg neresse;
minne Caradhras- i lossë ne
thalion; i cirith ne ú-na aute.
Hin melloni minna i mor mardi quante
aegeva hothi: i iaur mardi o i noegyth
esse Moria. I orch ngwawi
ortane Balrog mí balë;
tireyes, aegello ore.
Boromir ne avar cela.
I Balgrod utuva hain,
ar hin er cele i yanta o Khazâd-Dûm.
I Balrog khile, echa sinome,
risa ramba.
Khila hi, i Balrog ar Gandalf lantaer
mí iâ i yanta vane thrad.
I este o i melloni entúle edre dori.
Hin kele Lothloriënesse,
ar hele Amon Henesse.

Amon Henesse, nev i lanthiresse Rauros,
na nav i cor an
nalle o Boromir; Boromiron ore ne vanwa.
Boromir nenur, si, o i cor,
estele tur oyes.
Boromir utuve Frodo er, estele cheba i cor.
Frodo ar i cor kele
ar Boromiron ore entúla.
Boromir aha mí orë.
Frodo ar Sam er keler.

I este o hain dagnirer Uruk-hai,
aeg yrch, huani o i Hen.
I yrch ner túl cheba i Pheriain
utuve, an er o hain cheba i beleg cor.
Si Frodo ar Sam vanwa hainello, i yrch utuve Pippin ar Merry.
Boromir túle ve i yrch túler cheba
i Pheriaini mandoesse. Macil maesse,
Boromir dagora i Uruk-hai.
Ethrimë, Boromiron til ne súle,
i til o Gondor; i glam ne asca
Minas Tirith ar ne lhawesseyes.
Aragorn laste ar faroth
o Boromir, asca mí taurë.
Aragorn chebe nólë- hi ú-ne man.
I Uruk káno, i Ugluk aeg,
echant man o cú.
Boromir enú-dagor,
lantae arda.
I Pheriaini echant man o hainon tûr macili,
dagora i Uruki. I Pheriainor dagor
ne ú-an; i Pheriaini ner chebe palan.
Ilúve vanwa i Pheriaini.
Aragorn utuve Boromir iesse til,
guina, úecha man o
i annaello i Uruk-hai.
Cheba nólë o umbar, Boromir quete i vedui
quettar nef chae. Mí vedui wilya,
Boromir quete Gondor ne quelle,
ar túle gurth.
Dimniëesse, Aragorn caite Boromir ar macil,
i til, ar hoth
o firn Uruk-hai macili, quendiniëesse cirya.
Aragorn, Legolas o Boromir line,
hi atan ar hi quendi, nainië.
I taurëesse i omar ner varda.
I súli ner nalle dimniëesse.
Boromir i astalso, i vana, i halla,
Boromir ne esse. I cirya kele
ndu i Rauros, ar riseyes
meneresse i cirithi.
Lindër quetarm
i cirya ú-rise
ar kele lintenië thrad i aelin
ar mí luinë, ar Faramir
utuveyes ar be quante o gaya
ar ve i cirya túle menesse o Faramir,
Faramir ne nólë o i macar mi cirya.
Faramir nalle ethesse dimnië,
an nesse Boromir. Ve asea,
i cirya ne chebe palan mí Anduin.
Faramir ú-nólë i pata o Boromiron gurth.
I cirya túle i ëar.
Nuvayes este mí ëar.

Si met i Laer o Boromir.
Thalion ar astaldo, Boromir nólë ú-gaya.
Boromir lantae, macilesse ma,
dagor o nil, ar haeo Gondor.