I've been trying to change GNUCash UI language as it's described here: Link
...by running the following command in the terminal:
LANGUAGE=ar_SY LANG=ar_SY gnucash
But it returned the following:
The locale defined in the environment isn't supported. Falling back to the 'C' (US English) locale
Any solution please?
I think there must be a general way to run a GTK application with a specific language.
If anybody is interested, a solution that can be used on Mac OS X (Yosemite) is to add these lines in Gnucash (in this case for Italian):
Following the advice on the above metioned link, these three lines should be added just above this part:
Gnucash is an executable file located inside Gnucash.app that is present in your Applications folder (you should see Gnucash without .app extension). If you select it and in the dropdown menu you click on "Show Package Contents", you will find the Gnucash executable file in /Contents/MacOS folder. You can then modify the file with your preferred text editor.