You can build bigger menus that a popup and sort them into usable buckets. Take a look at tesla.com. The shitty CEO aside, the language/locale menu does it rig

You can build bigger menus that a popup and sort them into usable buckets. Take a look at tesla.com. The shitty CEO aside, the language/locale menu does it right: An understandable globe icon opens a menu, that menu is sorted by continents, countries and for those countries languages - with their name written in their local script.