Edit: your need to select both English AND Undetermined or it will cause issues for Lemmy users not being able to comment
I've noticed that it's sometimes impossible to reply to messages sent by Mastodon users. That is unless you remember to specify your language when sending the comment / reply, which is difficult to realize because it's a tiny field in a row of many buttons.
I just discovered that this problem goes away completely if the community's language is set to undetermined.
Example (won't work):
- Mastodon user replies or creates a new post by mentioning the community
- In community, language is set to English
- Result: lemmy users can't reply unless they select "English" when writing he comment.
Example (will work):
- Mastodon user replies or creates a new post by mentioning the community
- In community, language is set to English
- Result: lemmy users can reply normally.
This is important because it's often better to create posts from Mastodon to improve discoverability and conversation. But it beats the purpose if lemmy users are not able to reply.
If the community language is set to English, lemmy users will be able to reply.
(As far as I know, the language the post is set to does not matter, though).