Complacency is the last thing we need when we come to worship. And our worship is an utter failure if we fail to act on the Word and put it into practice through our deeds.
The Mass is beautiful, yes; but all of the people of God are to offer themselves as sacrificial offerings to the Father through Jesus in the Holy Spirit.
When the Word of God is proclaimed in the midst of the assembled church, the Body of Christ, we hear Christ, the very Word of God, and then in the great act of the Eucharist, Christ transforms us most fully into himself when we receive Him in the Eucharist.
The original Liturgy woudl have been celebrated in Aramaic, Hebrew, then later it was Greek. It was only later that Latin came into use. However, it is the same Mass.
In the final analysis, unless the celebration of the liturgy changes us and empowers us to go forth in Christ's Name and in the Holy Spirit to do the works of the Lord, then our worship is empty and can even be an act of selfish narcissism.