The panel says: "Memória: 605MB, amiből 2010MB használt" In English: "Memory: 605MB, used: 2010MB" So it is reversed as if it were using 2010mb out of 605. (My pc has got 2Gb memory.) I believe that the string formatting has been reversed. The correct would be: "Memory: 2010MB, used: 605MB"
Fixed: http://git.xfce.org/panel-plugins/xfce4-systemload-plugin/commit/po/hu.po?id=67804be7b09c3a8a43125d27de7eae03733118b1 Thanks for the report, and apologies for not noticing it. You can also use the Hungarian one-localization-bugtracker-to-rule-them-all solution in the future, http://bug.openscope.org/ - I'm a lot more active over there ;).
Thank you :)