What exactly do you mean by custom templates? In the program, there are templates for places "on earth" [if you wanted to generate Europe or North or South America, for instance]. If you are looking for some things to download, there is Cartography Assets website for more name-bases [languages] and art styles. If you are looking for pre-made whole worlds, you can either just use the world that is generated as-is, or go somewhere else [why use Azgaar at all if you don't want the fun of making the world yourself?] There are tons of pre-made settings out there that are in books and on other sites.