How to get the "Friends the World Over" achievement in Genshin Impact. READ DESCRIPTION
I know this video is incredibly off-topic for this channel (don't worry, it's just an exception), and I usually put videos non-music videos like this unlisted, but I figured it might be helpful to someone, since I haven't found any videos actually showing the achievement pop-up (as of the date this video was published, at least).
How to get this achievement? You just gotta talk a lot of times to this Millelith, which is located in front of the Golden House (near Liyue Harbor). How many times? I honestly have no idea. This took roughly 3 hours, so I'd say around 3000 times. The video obviously only shows a moment in which I was very close to getting the achievement (who would want to watch a video like this one but longer?), which you can see pop-up briefly at 0:17.
Any other NPC works too, but this NPC should be the fastest the way, since there are no dialogue options.
Shoutout to several people from Enviosity's chat for sharing the method.