Multiple language

[monstreyhans]

For the moment i use only one language. Now i want to use different languages.
When i install another language i get error or a blank page on my site.
The url is good : ../NL . I have the prefix of the language, but "the page not found".
I have made a new regeneration of the .htaccess with the same result.

[inveo]

Please change the language code to "nl" in ZenCart admin panel.