Trending-Github is a public API available for everyone, allowing you to get the repositories currently trending on Github, filtered by period, programming language and spoken language !
You can explore the API through this page.
For now, it offers 3 routes:
/github/spoken-languages: to get a list of the spoken languages supported by the API
/github/languages: to get a list of the programming languages supported by the API
/github/repositories: To get a list of repositories