URL Structure for geo location for specific page

[Rajnish_HE]

On hackerearth.com/challenges page, there is an option to select languages. This option is in the footer. Once you select the language the url changes. Ex - if we select French, the URL changes to hackereath.com/fr/challenges. In case we decide to change the URL of this page with Geo, what should be the URL structure which accommodates languages as well.

My research says that it would good to keep the url like domainname.com/page/language.