El dolor me angustia, el tormento me oprime. La cara pálida se me tiñe de amarillo por el ánimo. Boca mÃa, llama al Todopoderoso y que aplauda la multitud. Ah, pide verme miserable en el cruel mordisco?
Pain afflicts me, torment oppresses me. My pale face becomes yellow by the will. I want my mouth to call for the Allmighty to clap hands at the crowds. Oh, is it needed a miserable worm in the cruel bite?
Remarks about the translation
Difficult understanding.
There is no way to make that more understandable in English.
I wouldn't take away the apostroph Lilian, the speaker is actually speaking to his mouth: "Os meum, voca Omnipotentem!"
On the other hand, your translation is more fluent than "Mouth, call for the Almighty!"
EDIT: this was my try, maybe it can help.
"Pain weighs down on me, torture oppresses me. My pale face turns yellow because of my mind.
My mouth, call for the Omnipotent and for the crowd to applause. Ah, does he ask to see me, miserable, in a cruel bite?"