> Dutch "citroenmelisse" which is a plant that looks like mint but tastes
like
> lemon a bit, small green leaves and very tasty.

I looked it up in Wordfinder - it is called "lemon (garden, sweet) balm" in
English. In Sweden the old name is  hearts delight or hearts joy
(hjärtansfröjd) and that's because it was considered good against
depressions. It's very easy to cultivate, behaves like a weed. If you have
one plant the first year you'll have i a million the next.