@GluedToTheScreen You're not necessarily intended to join several instances, as you should reach the other instances just fine from your instance (server blocks being the exception, only 3 servers are fully suspended from M.s). If you do join several, it's often because you want different identities.
You can filter out languages in your settings, if the myriad of languages become an issue.
I thought the federated timeline only included posts from "external" users who are being followed by "internal" users.
The federated timeline is not a firehose of ALL instances, right? It is "by invitation only"... or that was my understanding.
Please DO correct me if I am wrong.