But it is a mistranslation, and the Latin rite has been saying "and with your spirit" for more than a millenium at least. The Latin says:
Pax vobiscum. Et cum spiritu tuo.
I for one and glad to be returning to a proper translation and the venerable language.
To each his own.
Dittos
In Germany they actually say; "Und mit deinem Geiste"
"And with your spirit (ghost).
Also they are starting to sing the "Agnus Dei" and "Sanctus" in Latin more often in my parish.