Question: Why is it not using the correct Wikimedia-override version of a string at Frwiki/Hewiki/Eswiki? (and many others)
It should be using (wikimedia-createacct-imgcaptcha-help) but instead is currently showing the generic version (createacct-imgcaptcha-help)

i.e. 3 working/overridden examples, and 3 broken/generic examples
(USE A PRIVATE WINDOW to avoid autologin ;-)

• https://en.wikipedia.org/wiki/Special:CreateAccount?uselang=qqx
• https://de.wikipedia.org/wiki/Special:CreateAccount?uselang=qqx
• https://ca.wikipedia.org/wiki/Special:CreateAccount?uselang=qqx
• https://fr.wikipedia.org/wiki/Special:CreateAccount?uselang=qqx
• https://he.wikipedia.org/wiki/Special:CreateAccount?uselang=qqx
• https://es.wikipedia.org/wiki/Special:CreateAccount?uselang=qqx

Notes:
The override text is translated at https://translatewiki.net/w/i.php?title=Special:Translations&message=MediaWiki%3AWikimedia-createacct-imgcaptcha-help
and the link within it is translated at https://translatewiki.net/w/i.php?title=Special:Translations&message=MediaWiki%3AWmf-createacct-captcha-help-url
The generic text is (barely) translated at https://translatewiki.net/wiki/Special:Translations?message=MediaWiki%3Acreateacct-imgcaptcha-help&namespace=8
and in practice seems to mostly consist of local overrides such as https://es.wikipedia.org/wiki/MediaWiki:Createacct-imgcaptcha-help and https://it.wikipedia.org/wiki/MediaWiki:Createacct-imgcaptcha-help
I found an old partial explanation about the generic version - at https://fr.wikipedia.org/wiki/Wikip%C3%A9dia:Le_Bistro/29_mai_2013#Refonte_des_pages_de_cr%C3%A9ation_de_compte_et_de_connexion - but it doesn't hint at the Wikimedia-override version or how to make it visible