YOU SAID:
That mourns in lonely exile here Until the Son of God appear
INTO JAPANESE
神の子が現れるまでここの孤独な流浪の嘆くこと
BACK INTO ENGLISH
Mourning in lonely exile here until the son of God
INTO JAPANESE
ここでの孤独な流浪で神の御子まで喪に服して
That didn't even make that much sense in English.