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.
There might be a problem in the .po translation files. In that file, the direction should be defined according to this article.