First of all, a little How-To Changing language in WordPress:
How to install language files?
All language files for dialogue have to be stored in the themes main folder (e.g. /wp-content/themes/dialogue/)
How can i change the language?
The language is defined by your entry in the wp-config.php file in your wordpress root directory. Download wp-config.php from you webserver and open it with a (html) editor. Search for:
define (‘WPLANG’, ‘ ‘);
and add to name of the language file between ‘ ‘. For example, you must add following for change the language to german:
define (‘WPLANG’, ‘de_DE ‘);
Save the changes and re-upload the wp-config.php into the wordpress roots directory (confirm to overwrite the existing file if prompted).
Which languages are supported by dialogue?
Currently, dialogue theme supports following languages:
German (de_DE) and English (en_EN). These language files are already included in the theme, so you do not need to install them on your own.