By uploading font files into your brand library our tools are better able to generate within the boundaries of your distinctive brand world.
When using font files you must ensure that the file is suitable for a given language otherwise you may see missing or incorrect characters. You can check if a font file is suitable for a given language or not using a tool such as FontDrop.
You can see what fonts you have uploaded as well as upload new fonts by navigating to your Brand Library and scrolling down to Fonts: