Translated Letter is a component in the Bride of the Embalmer quest chain and is provided for the quest  .
You see, I am a creator. I fooled the bearer of this note into aiding me in my latest, most dire creation - a fiend of flesh and bone and twisted metal! As you read this, it's likely outside my humble dwelling, gnashing its teeth and waiting for my word to go forth and slaughter.
But you'll know soon enough.
This is the after it has been translated by . When you carry the Translated Letter from Sirra Von'Indi back to Mayor and complete the  You are offered the final quest in the quest chain,  . At this point you receive the Translated Letter back, but you no longer need it and can safely discard it. It will not be cleared from your inventory by the quest chain.