But there is in Yiddish:
There is no English word for the Yiddish machatunim; in Spanish it is consuegros and means "co-in-laws." The parents of the people my children have married are my machatunim. Having a word in one's vocabulary to define the relationship gives that relationship the importance it deserves. My wonderful grandchildren are not mine alone but are shared with my machatunim. Together we have celebrated the marriages of our children, baby namings and the Bat Mitzvahs of the two oldest grand-girls. Hopefully we will be together for more Bar and Bat Mitzvahs and we will all dance at the grandchildren's weddings.
My favorite word - machatunim - just because there is no English equivalent. If Jill and Joe get married, that is the relationship between Jill's parents and Joe's parents.
Who's coming for dinner?
My son, his wife and the Machatunim.
Better get out the good plates!