Hi Alzo9204,
Welcome to the Mageia Forum!
To install another language is necessary to install some packages (software).
1 - The first step is choose the package of
locales.
Example:
locales-de-2.14.1-3.mga2.i586.rpm - Base files for localization (German)
locales-el-2.14.1-3.mga2.i586.rpm - Base files for localization (Greek)
locales-en-2.14.1-3.mga2.i586.rpm - Base files for localization (English)
locales-es-2.14.1-3.mga2.i586.rpm - Base files for localization (Spanish)
2 - You can install by the graphics mode, in the Software Manager - MCC (see
here and
here) or at text mode (see
here)
3 - After installing the language pack you choose, go on "Mageia Control Center", in tab "System" and in "Manage Location for Your System":

4 - Select the language that was installed, click in "next":

5 - choose your country and click in "next":

6 - and click "ok" and restart your computer:

7 - After restart the computer, you will need to install additional language packs, depending on the graphical environment you use and what software you're using.