[Spoiler Warning] Question for those who have finished MGS 4

[Musouka]

^^^
You mean "Love Theme"?

 Yeah, Kojima wrote those lyrics in Japanese and they were then translated into Hebrew.

Here is a scan from the OST booklet (click on the image for a bigger version):

And here is an English translation, courtesy of Metal Gear Wikia:

Closing my eyes to the sound of gunfire
Uttering a roar
In a flash I am switched into despair
Everything for the one who lives inside the nightmare
Missing from the bottom of my heart

Wishing the world that ran out of tears
The heart is already dead
The hope
Missing until it hurts