Change Language ?

[jav4u]

Now, I used WP-EN version. But now i want change to WP-Japan version but still use old database
Anybody help me

 

[Froomple]

Changing the language is quite easy. You can read the instructions to do so here.
In short here are the required steps.
1. get the .mo file of your desired language at the mo file repository.
2. Upload the file to the folder "/wp-content/languages" (if not existent, create one).
3. Open your wp-config.php file and edit the line: define('WPLANG', 'xx_XX'); (whereas xx_XX stands for your country code).
4. done


Source:
http://wordpress.org/support/topic/changing-the-wordpress-language-after-installing-it


More Reference:
http://www.wikihow.com/Change-the-Default-Language-in-Wordpress
http://pengbos.com/blog/how-to-create-a-multi-language-wordpress-site
http://webpolyglot.com/how-to-create-a-multi-lingual-wordpress-site/