The following interpolation key is invalid: name

Support
5

This is not my area but taking a look at ALLOWED_CUSTOM_INTERPOLATION_KEYS it appears you can use additional values for certain messages.

In particular:

    %w[system_messages.welcome_user] => %w[username name name_or_username],

I think if we changed this to:

    %w[system_messages.welcome_] => %w[username name name_or_username],

It would let you use those for other welcome messages. I’ll ask around.