On the DN and invoice some Dutch words (instead of placeholders) are printed, I want to print other words instead. Like 'Afleveringsbewijs' on a DN is not quite right, this should be 'Pakbon'.
Where can I change this?
Also in the {contact} placeholder, my name and address are printed, but the country is ' Netherlands', I would like this to be ' Nederland',: in Dutch.

Hello. Dutch language is stored in SITE ROOT/language/nl-NL/nl-NL.com_vminvoice.ini, you can change translations there.
(beware! files gets overwritten on component update, so you have to make modifications again after update - or make some backup of this file and rewrite back after update).
If you you have enabled "cache PDFs", you must reset cache after you make some modification to translation files - do it by changing some configuration option, saving and changing this option back, so cache will be cleared.
If you belive translation can be better, you can send us fixed version to Tato emailová adresa je chráněna před spamboty, abyste ji viděli, povolte JavaScript , so we can include it in our next release.

As for country name - currently we take country names directly from VM table (VirtueMart -> Configuration -> Countries). So you can change country name there. But we noticed that country names should be translated using com_virtuemart_countries.ini file to invoice language. So we will include this functionality to our next release. Thanks much for mentioning this.

Solved via e-mail.