To be licit: yes.Does the consecration of the host need to followed word for word reflecting the rubrics. I have been experiencing a Priest using his own version when elevating the Host. Is there someone other than an official from the Diocese who can correct this?
Sometimes we use the word “rubrics” when we mean something else. The 'rubrics" are the words in RED, they say what to do like “Raise the Host slightly while speaking the words of Consecration”Then again my pastor once told me that the rubrics of the Mass are no more than “whims and fancies.”
- The Eucharistic Prayer
[51.] Only those Eucharistic Prayers are to be used which are found in the Roman Missal or are legitimately approved by the Apostolic See, and according to the manner and the terms set forth by it. "It is not to be tolerated that some Priests take upon themselves the right to compose their own Eucharistic Prayers"129 or to change the same texts approved by the Church, or to introduce others composed by private individuals.130
[52.] The proclamation of the Eucharistic Prayer, which by its very nature is the climax of the whole celebration, is proper to the Priest by virtue of his Ordination. It is therefore an abuse to proffer it in such a way that some parts of the Eucharistic Prayer are recited by a Deacon, a lay minister, or by an individual member of the faithful, or by all members of the faithful together. The Eucharistic Prayer, then, is to be recited by the Priest alone in full.131
[53.] While the Priest proclaims the Eucharistic Prayer “there should be no other prayers or singing, and the organ or other musical instruments should be silent”,132 except for the people’s acclamations that have been duly approved, as described below.
[54.] The people, however, are always involved actively and never merely passively: for they “silently join themselves with the Priest in faith, as well as in their interventions during the course of the Eucharistic Prayer as prescribed, namely in the responses in the Preface dialogue, the Sanctus, the acclamation after the consecration and the “Amen” after the final doxology, and in other acclamations approved by the Conference of Bishops with the recognitio of the Holy See”.133
From what the OP reports, this is serious. However, as someone else noted, there are 13 Eucharistic Prayers approved for use in the United States. The big question would be, though, if the priest took it upon himself to edit the institution narratives, because these do not differ very much, one from the other. While the Roman Canon talks about Jesus taking the bread in his Sacred Hands, the words of institution are pretty much the same as EPII, the shortest of the Canons, presumably written by St. Hipolytus.[55.] In some places there has existed an abuse by which the Priest breaks the host at the time of the consecration in the Holy Mass. This abuse is contrary to the tradition of the Church. It is reprobated and is to be corrected with haste.