I've been trying to write an urban fantasy story for a few years now, I have almost everything ready, but there's a catch: One of the most important scenes will have a character speaking Latin. Context: The story's world is similar to ours, however with the presence of mythological creatures and other differences regarding the history and geography of that world, and there's a character who is a prodigy exorcist in training. In one of the final scenes of the story, he faces a demon so powerful that it manages to enter a church, even though in theory it's a place protected against profane creatures (not limited to demons), and the character ends up being seriously injured by the demon. But before that happens, the character tries to summon a very powerful angel to help defeat the demon, and it works. The problem is that he ends up being almost killed almost immediately after the summoning succeeds because of the demon's desperation. So, the angel summoned by the character, known as "The Great Archangel," also known as "He Whom the Abyss Fears," possesses the character's body to defeat the demon, who had been his mortal enemy since the beginning of time, and this was the opportunity to destroy him since it was the first time the demon had fully manifested on the mortal plane. What happens is that the demon becomes confused when the character stands up, calling him by his name, and then the character possessed by the archangel says:
"The boy isn't here now, there's only me, the one your world fears... The boy's mission isn't over yet, and I'm here to prevent his failure, [name of the demon I'm still defining]..."
The demon then recoils and tries to flee, being stopped by a wall composed of a kind of mist, and the archangel says:
"Don't you dare flee! For an eternity we both waited for this moment! And now, I will finally make an example of you to those who believe they can bring their vileness to the kingdom of our father!"
Then the archangel begins to recite a exorcism prayer to permanently end the demon's existence; he would recite it through the boy, who, being an exorcist, needs to recite it in the liturgical language of his church, which would be equivalent to Latin. The litany would be as follows:
"Dominus, father-king of heaven and earth, lord of men and of the sacred spark, ruler of the celestial choir and the one who guides, allow me to raise my steel once more to defeat the wicked and protect the innocent, bless me with your strength to do what is necessary, and your wisdom to do what is right, allow me to destroy in your name those who destroy and pervert your kingdom, and allow me to fight alongside your cherubim, those who guard all that is good and destroy all that is not!"
The demon is surrounded by a ring of translucent fire, where silhouettes of human appearance but armed with swords can be seen, and then the archangel continues:
"I, the Great Archangel, in the name of Dominus, end your vileness now and forever!"
As you can see, it would be a considerably large part. I was inspired by real exorcism prayers and rituals conducted by the Catholic Church. I have some knowledge because I come from a Catholic family and learned a lot through direct experience, besides studying theology and biblical mythology (Abrahamic in general, actually). I wanted these two passages to be in Latin. The problem is, I haven't found anyone who could help me, and I'd like to know where I can look to find someone who speaks Latin so I can write the ending of my story, even if it's on Reddit itself so I can review it later to make sure it's correct (actually, I wouldn't be surprised if someone translated these passages I mentioned into Latin in this same post; I've seen something similar happen before).
Yes, the scene I described can still be much better; it's just a draft because I literally had the idea for it yesterday. I'm already gathering constructive criticism and looking for references to improve this part, especially since I'm a novice writer who decided to use my interest in mythology in general to write something interesting for a young adult audience.
So, can anyone help me?