{{PLURAL:$1|protected variable|protected variables}}

$1 here is the list of protected variables, not their number, so that explains why PLURAL doesn't work. I don't know about the issue with FORMAL.

In T398476#10969105, @Daimona hat geschrieben:

{{PLURAL:$1|protected variable|protected variables}}

$1 here is the list of protected variables, not their number, so that explains why PLURAL doesn't work. I don't know about the issue with FORMAL.

But I think PLURAL is needed because otherwise in case of 1 protected variable only: "...protected variables: something" is wrong, at least for German

In T398476#10969166, @Raymond wrote:

In T398476#10969105, @Daimona hat geschrieben:

{{PLURAL:$1|protected variable|protected variables}}

$1 here is the list of protected variables, not their number, so that explains why PLURAL doesn't work. I don't know about the issue with FORMAL.

But I think PLURAL is needed because otherwise in case of 1 protected variable only: "...protected variables: something" is wrong, at least for German

Yes, sorry, I meant that the code is only passing a single parameter ($1) which is a comma-list of protected variables. That parameter is passed to {{PLURAL}}, but because it isn't a number, we can't apply pluralization rules to it. I'll quickly make a patch for this.

Change #1165963 had a related patch set uploaded (by Daimona Eaytoy; author: Daimona Eaytoy):

[mediawiki/extensions/AbuseFilter@master] i18n: Pass numeric parameter to PLURAL in protected variables message

https://gerrit.wikimedia.org/r/1165963

Change #1165963 merged by jenkins-bot:

[mediawiki/extensions/AbuseFilter@master] i18n: Pass numeric parameter to PLURAL in protected variables message

https://gerrit.wikimedia.org/r/1165963

In T398476#11063885, @Dreamy_Jazz wrote:

[…] the issue with the FORMAL is no longer needed to be fixed -> closing this.

The issue for this message was that the syntax was wrong – the message used {{#FORMAL|Dein Filter|Ihr Filter}} where it should have used {{#FORMAL:Dein Filter|Ihr Filter}} with a colon instead of a pipe.