Reading https://www.mediawiki.org/wiki/Extension:CheckUser/Client_Hints it looks like this is a feature of the chekuser extension itself not a Wikimedia-specific feature. Therefore, the wording of the message should be project agnostic (i.e. remove mentions of Wikimedia in the messages' text).
If needed, a Wikimedia-specific override can be created in WikimediaMessages with additional links to Wikimedia's privacy and access to nonpublic personal data policies.
QA Results - Local
AC | Status | Details |
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1 | โ | https://phabricator.wikimedia.org/T345549 |