First, in Latin, one of the oldest (although not the oldest) languages of the Church, and still our official language.

Requiem aeternam dona eis, Domine, et lux perpetua luceat ei. Animae eorum et anime omnium fidelium defunctorum, per misericordia Dei, in pace requiescant. Amen.

Now, in English, Katie’s native language (if she had one; some, like my mother, do not feel that they are native speakers of any language).

Eternal rest grant unto her, oh Lord, and may perpetual light shine upon her. May her soul, and the souls of all the faithful departed, through the mercy of God, rest in peace. Amen.