" It's Elvish," Tummeler repeated. "It says, basically, 'Declare allegiance, and be welcomed."
"Well, doesn't it perhaps mean that the magic word that opens the door is 'allegiance'?" Said Jack. "In Elvish?"
"That's a stupid idea," said John. "Then anyone who spoke Elvish could get in. "

― James A. Owen , Here, There Be Dragons (Chronicles of the Imaginarium Geographica, #1)