The domain registered in our database is www.domain.com and the CMS in use is WordPress. When trying to translate indeed that your pages are returning a 404 error.
The usual causes to check first is that the URL rewrite is properly activated on your system. In WordPress you can find the setting in Settings > permalinks
Moreover, please ensure that other translation plugins are disabled in your website. Some of our competitors add their own code in the .htaccess file, please also verify that your .htaccess file has no redirection from other plugins.
If you prefer you can provide your .htaccess file and we’ll check that for you.