After confessing your sins and (if) he councils you, he should tell you to say your act of contrition, you say it aloud as he is absolving you, make a sign of the cross when he does or when you're through. And yes, absolution will be in Latin.
Act of Contrition
O my God,
I am heartily sorry for having offended Thee,
and I detest all my sins,
because I dread the loss of heaven, and the pains of hell;
but most of all because they offend Thee, my God,
Who are all good and deserving of all my love.
I firmly resolve, with the help of Thy grace,
to confess my sins, to do penance,
and to amend my life.
Amen.