Reported at the URL.
The message was introduced by Kaldari, but I have no idea if Echo supports GENDER for notifications passed with this sort of construct:
https://git.wikimedia.org/blob/mediawiki%2Fextensions%2FThanks.git/cd51c766859c9413a7c719a26ffe8cec28447491/Thanks.hooks.php#L130
Needs someone working on those extensions.
Version: master
Severity: minor
URL: https://translatewiki.net/wiki/Thread:Support/Adding_extra_parameters_when_translating/reply_(4)