Then I disabled all plugins, and enabled them one by one. I found the problem starts when I enable the WPML String Translation plugin. Then I went to WPML > String translation. In the strings I searched for secretariaat@plugwise.com. There I found that has a translation to webshop@plugwise.com! The string that is translated is domain: admin_texts_woocommerce_email_from_address and name: woocommerce_email_from_address .
Screenshot: hidden link
I changed the translation and now it works.
Remaining WPML issue: When going to WooCommerce > Settings >Emails the “From” address does not show the translated string when switching to the Dutch language. It is therefore confusing that on that page the translation is not shown. I can imagine shops would like to set a different email in different countries, but this did make it hard to find the solution to solve the problem. WPML needs to solve this issue by:
- making it more clear that this field is translated
- and/or show the translation when switching the admin language on top.
The title of this feature request has been made by WPML. To clarify, to improve WPML one of the solutions could be to show the translated option when switching admin language. But even better would be to show after each field that is translated some type of WPML translation text or icon. Because I did not even think that the "email from" field could be translated and therefore did not try to see if changing the admin language will show a different field input.