Liferay support many languages as you need. All language specific text and storing are done by pulling out in language.properties files. Whenever a page loads, detect the language by liferay and pull up the corresponding language file then display the text in the correct language.

Adventage :

Easily support as many languages.
Have a central location for multiple languages
Translate text effectively.

Setting a default Language and default Country

Put below properties in your system.properties file.

 user.country=TR
 user.language=tr

For different languages, set unique URL

Language Unique URL
Chinese     http://www.liferay.com/zh_CN/web/guest/home

German     http://www.liferay.com/de/web/guest/home

The mapping web.xml:

<servlet-mapping> 
<servlet-name>I18nServlet</servlet-name> 
<url-pattern>/de/*</url-pattern> 
</servlet-mapping> 
<servlet-mapping> 
<servlet-name>I18nServlet</servlet-name> 
<url-pattern>/zh_CN/*</url-pattern> 
</servlet-mapping> 
<servlet-mapping> 
<servlet-name>I18nServlet</servlet-name> 
<url-pattern>/zh_TW/*</url-pattern> 
</servlet-mapping>