The "upright" value of img_upright in languages/messages/MessagesHu.php is mistranslated to fennjobbra. Correct translation would be álló.
Please replace fennjobbra in the value of img_upright with álló
Configuration file: /source/mediawiki/browse/master/languages/messages/MessagesHu.php$207, line 207
New value would look like:

	'img_upright'               => [ '1', 'álló', 'álló=$1', 'álló $1', 'upright', 'upright=$1', 'upright $1' ],

Discussion to change this setting: https://hu.wikipedia.org/w/index.php?title=Wikip%C3%A9dia:Kocsmafal_(k%C3%A9pek)&oldid=26177366#K%C3%A9p_upright_param%C3%A9ter