I got the following problem here (and I'm not alone), like in the title said, MultiGet doesn't remember the language-setting.
I'm able to change the language to my native language German, but after restarting MultiGet the setting is set to English again.
System is Ubuntu 9.10 Karmic, if you need additional information please let me know.
P.s. sorry for (maybe) bad English I'm from Germany so please excuse :)