How to disable automatic spell checking?

I am typing in both Dutch and English. My OS is set to English. 1P is set to "system default".

This happens both in the the notes section as well a regular text fields:

If you save the item, it's no longer visible. If you edit the item and the field gets focus, it's appears again.

I don't know why you would want to translate the message, that was not the point. The screenshot I showed was to demonstrate how annoying it is to have a gazillion red squiggly lines in my text, even my text is flawlessly spelled, but in a different language. I have the same gripe with MS Word, but there I can turn it off.

Checking spelling is a nice feature, but for those of us who are multi-lingual, and use the 1P app likewise, spellchecking becomes annoying. The ability to turn it off is then a must.

For good measure: using 1Password for Windows 8.10.35 (81035003)