Hello,
If possible I’d like to add a Dutch (NL) ‘formal’ localizationLocalization Localization (sometimes shortened to “l10n“) is the process of adapting a product or service to a particular language, culture, and desired local “look-and-feel.” repositoryWordPress Localization Repository The WordPress Localization Repository at https://i18n.svn.wordpress.org/ is a Subversion repository where official WordPress translations are maintained. See Working with the Translation Repository for details..
Could someone tell on how to do this best?