In statu quo, in the former state
In toto, completely
In transitu, in passing
Ipsissima verba, the very words
Ipso facto, by virtue of that very fact
Jubilate Deo, rejoice in the Lord
Jus gentium, the law of nations
Labor omnia vincit, labor overcomes every difficulty
Lapsus linguæ, a slip of the tongue
Lis pendens, the pending suit