I really don't know how standard this is, but I've been told "Khaire" could be used as a salutation and ending in prayer. It means "to take pleasure in something", "be well", "rejoice".
You could also just do whatever you'd like to end a prayer or hymn. Sometimes I just say "may you forever be praised." Of course, I love my St. Teresa works so...
Language isn't my forte, but here's the post I'm talking about: