@pdrolet yes, smart content supports browser language (and country), but this thread is suggesting “HubSpot load the relevant language homepage based on users locale” - the entire page. My response was about that use case, not smart content (which has a different purpose). As I wrote last time, there certainly are some cases where automatic redirection based on browser language makes sense, but there are a number of other approaches you could take to help a visitor get to the language they want, detailed in my previous posts on this topic (one easy option is using the smart content approach where you point a visitor to the page language that matches their browser -- note, smart content is not suggested for an entire page, for SEO reasons).
This decision has been carefully considered. I’ve done a lot of research, heard from numerous multi-language HubSpot customers all over the world, consulted with the localization team here at HubSpot, and discussed this with other product managers. This particular feature may be revisited in the future, but at this time there are a number of other features that are more highly requested and urgently needed by customers.
If you’d like to discuss this further, please message me! I’d be happy to set up a time to speak with you and get into the details 
All the best,
Snaedis