The following strings are translatable but localized strings are not shown on the dialog. panel-plugin/systemload.c:819: N_ ("CPU monitor"), panel-plugin/systemload.c:820: N_ ("Memory monitor"), panel-plugin/systemload.c:821: N_ ("Swap monitor"), panel-plugin/systemload.c:822: N_ ("Uptime monitor") Build & Platform: Build 2012-02-21 on ArchLinux Locale: ja_JP.UTF-8
Fixed in Git. http://git.xfce.org/panel-plugins/xfce4-systemload-plugin/commit/?id=b4628aef069ce78339d33c35de33f9d2abba05ec Thanks for your report :)