Libera me, Domine, de morte aeterna in die illa tremenda
Quendo coeli movendi sunt et terra
Dum veneris judicare saeculum per ignem
(Deliver me, Lord from the eternal death
On that dreadful day when heavens and earth
Shall move, when you come to judge the world through fire)
[ Lyrics from: http://www.lyricsfreak.com/b/believer/dies+irae+day+of+wrath_20187102.html ]
Tremens factus sum ego, et timeo
Dum discussio venerit at que ventura ira
(I am made to tremble and to fear
At the destruction that shall come
And also at your coming wrath
When heavens and earth shall move)

Dies illa, dies irae, calamitatis et miseriae
Dies magna et amara valde
Dum veneris judicare saeculum per ignem
(That day, day of wrath, calamity and misery
Great and exceedingly bitter day
When you come to judge the world through fire)

Requiem aeternam dona eis domine
Et lux perpetua luceat eis
(Rest eternal, grant them, Lord
And may perpetual light shine on them)