Trebraruna Lyrics
Guerreira sagrada, Deusa do Amor
Trebraruna teu leito semente
Acolhe-nos agora num muy doce abra?o
Trebraruna ?s Vida ?s Morte
da Lua ?s filha, dos Lobos consorte
Trebraruna pag?o ? teu ventre
Ansiado ref?gio de quem ainda te sente
Viva!
Alimento teu seio d'Amor e de Guerra
Trebraruna a tua voz ?
a melodia mais doce da nossa Terra
Trebraruna n?s tuas crian?as
Beijamos teus olhos cerrados com fervor
Trebraruna cantamos para ti
Somos teu eterno, fiel trovador

Translation to English:
Trebraruna daughter of Pain Godess of love, Holy warrior Trebraruna your tomb-seed Welcome us in the sweet embrace Trebraruna you are Life you are Death you are a child of the Moon, wolves' consort Trebraruna, pagan is your womb Anxied refuge of oneswho feel you Alive! [§]
Trebraruna it is you who creates (and) I feel your breast of love and war Trebraruna your voice is the sweetest melodyof our land Trebraruna us, your children we kiss your eyes closed with frevor Trebraruna we sing for you We are your eternal, ever loyal trobadour
[§] - Viva is the original word of the song which means literally alive, and
that can be used as an expression of joy in Portuguese language adopting this very sense on the song.

Actually the song is called Trebaruna (from the celtic "Trebo" - meaning 'home' - and "runa" - meaning 'secret' or 'mystery'), after the Goddess of the House, Battles and Death in Lusitanian mythology. And Viva, in this context, means something like 'Hail!' (it is used as an expression of showing respect and/or joy, that's correct)

Good early Moonspell. Sounds almost like an irish drinking song at first.