This is all a Catholic need assent to.
You are quoting that the Church gives permissions for something. The fact that other languages are permitted, or the fact that woman altar servers are permitted, or that CITH is permitted, is nothing one needs to “assent to” other than that it is a reality that these things are currently being permitted. Permission only means it is not forbidden, as it was previously for 15-20 centuries. That’s it.
I think we would both agree that a reality that something is permitted is not the same thing as a positive teaching. I can permit someone to do something less than perfect or ideal but that does not mean I am telling him he must believe in the
action as if the action were a dogma that required assent of faith.
On the other hand, when we have positive teaching of something as a fact that is solemnly promulgated by the Church’s Magisterium in an Apostolic Constitution, then it does require religious submission of will and intellect.
Lastly, we are not Protestants who take the Catechism as if it were the Bible and contains the entire sum of everything we ever need to know and no other truth exists beyond. They are
sola Scriptura, but we are not
sola catechismus. The catechism may be the starting point for many things, but when we dig deeper into let’s say why does that canon say the Eucharistic celebration is to be carried out in Latin by default or by permission in another language? Why does it mention Latin like that? Where did Latin come from? What is its significance? That’s when we go and dig deeper and find the rest of the Church’s teachings on the subject, including all those aforementioned teachings and definitions earlier shared. Make sense?
PS, here is an article from Fr Z that contains the Church’s present teachings on Latin, including the teaching of Vatican II that says “the Latin language must be retained” for worship.
http://www.madisoncatholicherald.or...-is-language-for-church-teaching-worship.html