It's time gamers can hear the actual infernal language being spoken by devils and/or their mortal minions.  To that end, here are some soundbites of the Infernal language each with its own intonation angry, call to battle, disgusted, formal conversation, neutral, and snide.  

Don't just say that your players hear someone say they are speaking infernal, actually let them hear it! 
Alex Jarzebinski from OCGG wrote the creative brief for this piece.

Infernal Language - Snide - AIFR Productions

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