By default, Joomla!® installs with GB English (en-GB) pre-installed.
However, translations are available of the interfaces, sample data and help screens in a large number of languages.
If no language pack is available for your required / preferred language, instructions are available for creating your own translation, which you can also contribute to the community by starting a translation team to create an accredited translation.
Installable Language packs are available in the following Languages. Do note than a number of these translations may be at various stages of completeness - they are often produced by volunteers who contribute the translation pack to the Joomla community.
Below we have created two tables - one with language packs listed alphabetically by language and one with language packs listed alphabetically by ISO 639-1 language code.
For the benefit of mobile devices and/or smaller screens which will show these two tables vertically (one below the other) you can find the Joomla Language Packs ordered by language here and by ISO 639-1 Code here
Joomla version 3.x Language Pack List By Language
Alphabetical extension index: select a letter to go straight to that lettered section.
Translations of the interfaces are installed using the extensions manager in your website administrator area and then managed using the language manager.
If you have two or more languages installed you may enable the language switcher plugin and module. These should always be used together. If you create multilingual content and mark your content, menu items or modules as being in specific languages and follow the language switcher tutorial your website visitors will be able to select a specific content language using the module. By default both the language switcher plugin and language switcher module are disabled.