How can i change StarDict dictionary language?
I want to set it to English.
There is a freeware, Language Switcher, to launch an app in a different language.
Or, you check another thread for more detail: Is it possible to launch a program in a specific language?
If you know what language setup "StarDict.app" is using at the present moment, you could just change this particular "language.plist" to "english.plist".
To do so: Show contents of Star.Dict.app → Contents → Resources.
Better make a backup of the original english.plist first and if you are not sure what .plist is currently loaded you could rename them all, one by one until you found out!