og:url and og:locale/alternate

[Manvel]

Background

Lately while presenting cmints slides and talking about social media, I was asked why og:locale and og:locale:alternate do not provide URL in order to guess the URL similar way it's done for rel="alternate" hreflang="x". The reason might be that Facebook does send a header request using og:url in order to get the translated content.

What to do

Add og:url into the slides and also make a note about that.