[[MediaWiki:Babel-4-n/fr]] seems to be wrongly labelled as FUZZY because of use of $4.
French has gender, so we need to use $4 to distinguish male and female users.
For some reason, using $4 makes the message labelled as FUZZY. At the same time, other messages in French (e.g. [[MediaWiki:Babel-3-n/fr]]) and other -4 messages (e.g. [[:MediaWiki:Babel-4-n/es]]) work with $4 and are not labelled as FUZZY.
An expected behaviour is having $4 allowed.