WordPress wont change language.

I cant get my WP on a newly made webshop to change language. Neither will the template or woocommerce.

I got the WP files in my language directory for my language and i have defined the language in the wp_config

define (‘WPLANG’, ‘da_DK’);

Corresponding to my language files in wp-content/languages

What am i doing wrong :/

If i look in the status of woocommerce it says Language: da_DK but nothing is happening, everything is in English.