Wikimedia Bugzilla is closed!

Numbers in the EXIF data block on image description pages are always rendered in English format instead of the format of the user's preferred language.

The relevant code seems to be function formatNum on line 1082 of Exif.php, which is

01082         function formatNum( $num ) {
01083                 $m = array();
01084                 if ( preg_match( '/^(\d+)\/(\d+)$/', $num, $m ) )
01085                         return $m[2] != 0 ? $m[1] / $m[2] : $num;
01086                 else
01087                         return $num;
01088         }

It rather should be

01082         function formatNum( $num ) {
01083                 global $wgLang;
01084                 $m = array();
01085                 if ( preg_match( '/^(\d+)\/(\d+)$/', $num, $m ) )
01086                         return $wgLang->formatNum( $m[2] != 0 ? $m[1] / $m[2] : $num );
01087                 else
01088                         return $wgLang->formatNum( $num );
01089         }

Thanks