Since Bug 9573 patch "Lost items report - Move filters code to a separate js file", the table filters link is not translated anymore.
The call remains _("Activate filters") but this works only inside language folders.
Looks like there are other cases :
git grep '_(' koha-tmpl/intranet-tmpl/prog/js/ koha-tmpl/opac-tmpl/bootstrap/js/
Each js file must have an include ?
like : prog/js/catalog.js and prog/en/includes/catalog-strings.inc
*** This bug has been marked as a duplicate of bug 22490 ***