About [[MediaWiki:Flow-rev-message-reply-bundle/en]]
$2
is undefined in the source code, and should be replaced by $1
.
- Flow-rev-message-reply-bundle ("<strong>$1 {{PLURAL:$1|comment|comments}}</strong> {{PLURAL:$1|was|were}} added")
Reported in https://gerrit.wikimedia.org/r/#/c/96418/ . If that doesn't help I will file a bug tomorrow.
Done with gerrit:97909 by myself.