That’s one thing that cannot be done. The Extraordinary Form must be celebrated in Latin, except for the readins, sermon and hymns. Those can be in the language of the people. The missal promulgated by John XXIII does not allow for the use of modern languages.
This can be changed by the Holy Father. But as it stands right now, the rubrics call for Latin. In fact, they require that the priest and deacon actually understand the language, not just decode it. They have to be able to encode and process in Latin.
It’s not that hard to follow if you go to mass often enough. You can tell what’s going on and you know the prayers for each part. There are also booklets and missals with translations in various languages.
My Latin is rusty and I can follow it. I have not used Latin since I studied theology at Catholic University in the early 70s. It was interesting, because I went to Rome to do my doctorate and expected to do more reading in Latin, as we had done in the USA. By the time that I got to the Pontifical Universities in Rome, they were much further ahead than Catholic University of America. Rome had switched entirely to European languages and Latin was never uesed, unless you wanted to see the original text. Even the Vatican had changed over to Italian and Spanish. Latin was only used to write documents. I believe now they have more English at the Vatican since there are more Americans working there.
Fraternally,
Br. JR, OSF