Is Digikam available in my language ?

How can I use another language instead of the default (english) one ?

Distribution package

If you installed digikam using your distribution package, language files should be included with it and you can run digikam in any supported language.
You can change the default language by using KDE Control Center (kcontrol) :
Go to "Regional & Accessibility" and then in "Country/Region & Language" to use your default language.
Note, that will affects all your KDE applications.

You can also change the language used in digikam with the $LANG environment variable. Eg :

export LANG=fr.UTF-8 ; digikam

Compiled from stable or beta release

If you compiled yourself digikam using the official tarballs, you can use digikam in any supported language. The language files are installed with digikam.
See above for details about how to use another language.

Compiled from svn (Subversion)

If you compiled yourself digikam from the latest trunk files, you will have to get the languages files you need. Check the svn download page for more details (eg: sample script to compile digikam in your homedir).