In the administration section where the mail notification options are determined (/app/administration/email-notification:), the left column is for passwords, and the right column is for folders.
The texts in the columns are identical, though, referring to folders every time, which is correct for the right column but wrong for the left column.
I considered contributing the correction myself, but quickly got confused about the links you provide in this context:
Both links point to https://help.passbolt.com/contribute/translation which in turn gets redirected to https://www.passbolt.com/docs/
On that page there is a link “Contributor guide” pointing to https://help.passbolt.com/contribute which opens in a new window/tab only to be redirected to https://www.passbolt.com/docs/ again.
Best,
McL