Pronouns in Dutch are not polite
When a guest receives one of the automatic messages like the online check-in (which are not possible to change), than MEWS uses the familiar way "je" instead of the polite way "u" and "uw". So this messages would need to be changed as guests experience this as a rude way of addressing them.
We have conducted the testing with small amount of Dutch-speaking users and no one found it offending or impolite. Thus we don’t plan to change the default text. But we will have a look whether we can enable customization of email text, so you can adapt it to your tone of voice.
We will inform about these changes through our release notes.
Have a great day,