Well perhaps this is just an odd translation, but for instance; the preface for the Tridentine Latin Mass is: “Vere dignum et justum est, aequum et salutare, nos tibi semper, et ubique gratias agere: Domine sancte, Pater omnipotens, aeterne Deus.” / “It is indeed fitting and right, our duty and our salvation, always and everywhere to give thanks to You, Lord, Holy Father, almighty and eternal God.”
At whatever American Mass I celebrate, the translation is, “We do well, always and everywhere, to give you thanks…” This is an indicative, whereas the above is an imperative. (I’ve always been uncomfortable with this translation, by the way. I certainly don’t do well always and everywhere!)