Briard
If you don't want to invite your parents to a wedding don't tell them about the wedding in the first place.
what does the groom parents pay for at a traditional wedding
No it is not mandatory. Some parents (could be the bride to be's parents) may have the groom, bride, their parents and the wedding party out for dinner in the evening a few days before the wedding, but this is not mandatory either.
The family of the parents, perhaps some of those people who officiated at the wedding (bridesmaids / best man etc) and the children of the parents.
If the parents have paid for the wedding and reception and the wedding is canceled and the bride does not have the funds to pay her parents back for the expense then unfortunately the parents are stuck with the bill. If the bride can afford it then yes, she should offer to pay it back. The parents may decide not to take the money or they may be happy to receive it. If the parents gave the bride and groom money before the wedding to put towards a honeymoon; towards a house, etc., then yes, the check or money should be given back to the parents.
There is no such thing as a totally free wedding ceremony. If the couple get married by the Justice of the Peace there is a fee; if they have a traditional wedding then the bride's parents pay most of the costs and the groom's parents pay less of a cost for that wedding and reception.
The parents of the bride are very hapy.
There are many things that can be written in a wedding card from parents of the bride. The letter should include well wishes for the marriage.
L'anniversaire de mariage des parents
Traditionally no. The bride and groom enter as Mr. & Mrs. followed by the wedding party and the parents can follow behind or go ahead and mingle with the guests before the bride and groom enter the wedding reception.
Whose Wedding Is It Anyway - 2003 Marry Our Parents was released on: USA: 31 October 2009
The wedding to do list for groom's parents include hosting the engagement party. They provide the couple with a list of guests and host the rehearsal dinner on the evening before the wedding. They may also contribute to some of the wedding expenses.