On Sun, Dec 24, 2017 at 08:27:20AM +0100, Andre Majorel wrote: > On 2017-12-23 19:21 +0100, john doe wrote: > > > I have install Debian 9 using as the default language 'C'. > > I want to add some new languages, and for this I do 'dpkg-reconfigure > > locales'. > > I'm currently using Gnome and Mate. > > > > How can I add support for those new languages so all > > applications will be translated in the desired language (using > > command line is prefered)? > > Have you tried setting LC_ALL appropriately (eg LC_ALL=fr_FR) in > your .profile then logging out & in again ?
Do not use LC_ALL for this purpose. It should be reserved for emergency overrides on a single command basis. Use the LANG variable to set your default locale and character set. <https://wiki.debian.org/Locale> describes the basic concepts and procedures for selecting your locale. In order to receive output in your preferred language, each application needs to have been configured for localization *and* have a translation mapping for your language. The more common/popular a program is, the more likely this is to be true, at least for the more common languages.
