I am running Ubuntu Gnome 15.04, and every spell checker on the machine, and language etc, is in English (US), however I want to change that to English (UK), and I want to add support for Russian so that I can change to that when I wish, and tell my spell checkers to also change to that. In the normal Ubuntu 15.04 installation there is a language support section, and apparently in earlier versions of Ubuntu Gnome, however in Ubuntu Gnome 15.04 I cannot find this functionality.
So I believe my question is clear, in Ubuntu Gnome 15.04 how do I add additional language packs (specifically English (UK) and Russian)?
OS Information:
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 15.04
Release: 15.04
Codename: vivid
Best Answer
The terminal way
The terminal way is excellent described in answer of @GunnarHjalmarsson and in the answer of @Serg.
The GUI way
Start the Language Support via GNOME Shell or
language-selector-gnome(GNOME 3.14) orgnome-language-selector(GNOME 3.16) in a terminal.Click Install / Remove Languages… and select one or more languages to install