When I go to https://meta.wikimedia.org/wiki/OTRS/volunteering while logged out, I see:

OTRS/volunteering
< OTRS

<eventlogging-revision-id>

This third line indicates that there's a screwy interface message (or screwy localisation cache), I think.

The relevant HTML is:

<div id="contentSub"><span class="subpages">&lt; <a href="/wiki/OTRS" title="OTRS">OTRS</a></span>&lt;eventlogging-revision-id&gt;</div>

I'll upload a screenshot momentarily.

Version: unspecified
Severity: normal