Q. 1. I have 2 questions. First, what are the words used by the Catholic Church during the Sacramental Marriage? Secondly, can words be added to include a bride's vow to obey if both parties agree to this?
A. 1. Answering your first question, the words used by the Catholic Church during the Sacramental Marriage are:
"I, (name), take you, (name), to be my (husband/wife). I promise to be true to you in good times and in bad, in sickness and in health. I will love you and honor you all the days of my life."
"I, (name), take you, (name), for my lawful (husband/wife), to have and to hold, from this day forward, for better, for worse, for richer, for poorer, in sickness and in health, until death do us part."
During the Sacrament of Marriage, Catholic couples are conferring a Sacrament upon each other. This Sacrament, like others, uses words that have been approved by the Church to ensure its validity. Therefore, these words cannot be edited by deleting or adding a part of the words, no matter the reason. Such would be considered a liturgical abuse.
To answer your second question, during the Sacrament of Marriage, one cannot include a bride's vow to obey her husband, even if both parties agree. Such is not a Catholic practice.