Hey Kathy,
Thanks for the song, I like it too. Haha, will attempt to translate :p (must make use of what I've learnt) Hope it's correct :)

その日全世界が
That Day the Whole World Will　
作詞・作曲　長沢崇史わが神主よ
　
見させたまえ　偉大なるその計画天が開き
Before we have seen, 　the great plans that heaven reveals
光が満ち　シオンの上にとどまる救いの御業　
light fills 　On top of Zion rests (abides) salvation (?)
全地をおおい　喜びの歌響かせその正義は平和を呼ぶ　
Over the whole earth (there are) songs of joy, righteousness calls peace (??)
主の御霊が流れる
(The) Spirit of the Lord flows

その日全世界が　
That day the whole world will
主の御名高く掲げる
Lift high the name of the Lord
叫べ　王の王イエスにハレルヤ　
Shout King of kings Jesus Hallelujah
栄光とわにあれ王の王なる主イエスに
In glory, Lord Jesus will be the King of kings　
全能なる主イエスに勝利者なる小羊に
The Almighty, Lord Jesus will be the victorious Lamb　
栄光永遠にあれ
There will be glory forevermore

I think there's another verse but yay... I can understand the song (I hope!)
--Jasmine :D