This is the Latin Text
Pange, lingua, gloriósi
Córporis mystérium,
Sanguinísque pretiósi,
Quem in mundi prétium
Fructus ventris generósi
Rex effúdit géntium.

Nobis datus, nobis natus
Ex intácta Vírgine,
Et in mundo conversátus,
Sparso verbi sémine,
Sui moras incolátus
Miro clausit órdine.

In suprémæ nocte coenæ
Recúmbens cum frátribus
Observáta lege plene
Cibis in legálibus,
Cibum turbæ duodénæ
Se dat suis mánibus.

Verbum caro, panem verum
Verbo carnem éfficit:
Fitque sanguis Christi merum,
Et si sensus déficit,
Ad firmándum cor sincérum
Sola fides súfficit.

Tantum ergo sacraméntum
Venerémur cérnui:
Et antíquum documéntum
Novo cedat rítui:
Præstet fides suppleméntum
Sénsuum deféctui.

Genitóri, Genitóque
Laus et jubilátio,
Salus, honor, virtus quoque
Sit et benedíctio:
Procedénti ab utróque
Compar sit laudátio.
Amen. Alleluja.

This is the tradition English Translation
Sing, my tongue, the Saviour's glory,
Of His Flesh, the mystery sing;
Of the Blood, all price exceeding,
Shed by our Immortal King,
Destined, for the world's redemption,
From a noble Womb to spring.

Of a pure and spotless Virgin
Born for us on earth below,
He, as Man, with man conversing,
Stayed, the seeds of truth to sow;
Then He closed in solemn order
Wondrously His Life of woe.

On the night of that Last Supper,
Seated with His chosen band,
He, the Paschal Victim eating,
First fulfils the Law's command;
Then as Food to all his brethren
Gives Himself with His own Hand.

Word-made-Flesh, the bread of nature
By His Word to Flesh He turns;
Wine into His Blood He changes:
What though sense no change discerns.
Only be the heart in earnest,
Faith her lesson quickly learns.

Down in adoration falling,
Lo, the sacred Host we hail,
Lo, o'er ancient forms departing
Newer rites of grace prevail:
Faith for all defects supplying,
When the feeble senses fail.

To the Everlasting Father
And the Son who comes on high
With the Holy Ghost proceeding
Forth from each eternally,
Be salvation, honor, blessing,
Might and endless majesty.
Amen. Alleluia.

A More Literal Translation
Tell, tongue, the mystery
of the glorious Body
and of the precious Blood,
which, for the price of the world,
the fruit of a noble Womb,
the King of the Nations poured forth.

Given to us, born for us,
from the untouched Virgin,
and dwelt in the world
after the seed of the Word had been scattered.
His inhabiting ended the delays
with wonderful order.

On the night of the Last Supper,
reclining with His brethren,
once the Law had been fully observed
with the prescribed foods,
as food to the crowd of Twelve
He gives Himself with His hands.

The Word as Flesh makes true bread
into flesh by a word
and the wine becomes the Blood of Christ.
And if sense is deficient
to strengthen a sincere heart
Faith alone suffices.

Therefore, the great Sacrament
let us reverence, prostrate:
and let the old Covenant
give way to a new rite.
Let faith stand forth as substitute
for defect of the senses.

To the Begetter and the Begotten
be praise and jubilation,
greeting, honour, strength also
and blessing.
To the One who proceeds from Both
be equal praise.
Amen, Alleluia.