Yes ... it is:

Quote
Many major Temples, guilds, and other important places have permanent Teleportation Circles inscribed somewhere within their confines. Each such circle includes a unique sigil sequence - a string of magical runes arranged in a particular pattern. When you first gain the ability to cast this spell, you learn the sigil sequences for two destinations on The Material Plane, determined by the DM. You can learn additional sigil sequences during your adventures⁠.
https://roll20.net/compendium/dnd5e/Teleportation%20Circle#content


I still dont understand why cant we change Race for our hirelings. frown
Lets us play Githyanki as racist as they trully are! frown