The words of consecration in the Tridentine Mass contains “mystérium fidei” ,the norvus ordo does not! It has nothing to do with English.
And I just want to note that the SSPX tells that the Norvus Ordo is valid.
mystérium fidei or in English " the mystery if faith is in the Novus Ordo as well. Your statement is frnakly just false. from the USCCB WEB SITE of the 3rd translation of the Roman Missal
“TAKE THIS, ALL OF YOU, AND DRINK FROM IT,
FOR THIS IS THE CHALICE OF MY BLOOD,
THE BLOOD OF THE NEW AND ETERNAL COVENANT,
WHICH WILL BE POURED OUT FOR YOU AND FOR MANY
FOR THE FORGIVENESS OF SINS.
DO THIS IN MEMORY OF ME.
He shows the chalice to the people, places it on the corporal, and genuflects in adoration.
6. Then he says:
The mystery of faith.
And the people continue, acclaiming:
We proclaim your Death, O Lord,
and profess your Resurrection
until you come again.
Or:
When we eat this Bread and drink this Cup,
we proclaim your Death, O Lord,
until you come again.
Or:
Save us, Savior of the world,
for by your Cross and Resurrection
you have set us free.”
Even before the new translation it was there but the priest would say Let us proclaim the mystery of faith instead of just The Mystery of Faith.
If you are going to try and degraded the Mass of Pope Paul the VI at least be correct.