The main difference is that a homologue works with only one language, while a multilingual supports more than one language to search or access information. In recent years, the development and widespread use of artificial intelligence has made it possible to create systems that can work with different languages simultaneously, making multilogin a more relevant and powerful approach to lexical data access. You can read more about multilogin alternatives here
https://gologin.com/compare/multilogin-alternative? Those who are interested can answer some questions for themselves.