CCC 424 Moved by the grace of the Holy Spirit and drawn by the Father, we believe in Jesus and confess: 'You are the Christ, the Son of the living God.' On the rock of this faith confessed by St. Peter, Christ built his Church. "To preach. . . the unsearchable riches of Christ"
I thought Catholics were supposed to believe what the RCC teaches.
Greek grammar is the same no matter who reads it or for what reason. Catholics will teach what they teach but the grammar remains the same for everyone.
There is plenty of free information about Greek translation and grammar online.