When selecting the language from the dropdown on the
System/General Setup Page, the language displayed
appears to be one-behind the one you selected.
E.g. the default language is English, change to
French, language is unchanged, change to Italian,
lanugage changes to French, change to Spanish,
language changes to Italian, etc, etc.
The selected language should be displayed.
If you want to change the language to your preferred
language, you may need to keep selecting languages
past the one you want, in order to get to the
language you require.