(see also http://wiki.civicrm.org/confluence/display/CRMDOC/CiviCRM+Localisation)
Language and Currency
User Language - Select from the dropdown list the language used for this installation. Installed "translations" are listed in langageCode_countryCode format. Check the CiviCRM downloads page for additional translations if the one you need is not listed.
Default Currency - Select from the dropdown list the default currency you want assigned to contributions and other monetary transactions.
Monetary Locale - Select from the dropdown list the locale you want for monetary display (affects formatting specifiers below).
Monetary Display - Enter the format for displaying monetary values, i.e. "%c %a"
Legacy Encoding - If import files are NOT encoded as UTF-8, specify an alternate character encoding for these files. The default of Windows-1252 will work for Excel-created .CSV files on many computers.
Contact Address Fields - Selection Values
Default Country - Select from the dropdown list the country you would like selected by default when adding a new contact address.
Available Countries - Select the countries you want to appear in the Country selection field when adding or editing contact addresses. Click on a country name then click Add>>.
You can type a letter to move to that letter in the Country list, i.e., typing M takes you to Macao. You can also use Shift-Click, Ctrl-Click, etc. to select multiple countries.
Available States and Provinces - Select the countries' states and/or provinces you want to appear in the State/Province selection field when adding or editing contact addresses. Click on a country name then click Add>>.
Multiple Languages Support - CiviCRM installations can support multiple languages, allowing the user to switch from one language to another and allowing site administrators to maintain multi-language versions of many database-driven forms and pages (for example, you can create multi-language versions of an Online Contribution page).
In MySQL 5.0 the CiviCRM MySQL user needs SUPER, CREATE VIEW, and SHOW VIEW privileges to enable a multi-language CiviCRM.
These are in addition to "ALL" privileges.
mysql> USE db_name;
mysql> GRANT SUPER, CREATE VIEW, SHOW VIEW ON *.* TO 'db_user'@'localhost' IDENTIFIED BY 'password';
mysql> FLUSH PRIVILEGES;
Click Save to save your action or Cancel to cancel it.
If successful you will see the message "Your changes have been saved."