I think technically it's a fruit although they strongly resemble a vegetable:
What do you call these?
Personally, I know them as ‘paprika’.
Others say these are ‘bell peppers’, and only when ground into spice it's called paprika.
Besides grinding them into spice, you can also make soup of it or sauce. Or put slices of this on a pizza. I would call that paprika soup, or paprika sauce, or paprika slices.
Is this perhaps a difference between British vs American vs 'international' English?
P.S. regarding the fruit vs vegetable issue: not really related to the question here but I think from a botanical point of view it's a fruit, and from a culinary point of view it's a vegetable.
Best Answer
They are generally considered to be vegetables rather than fruit, regardless of how they have been classified by the botanical community.
As for the name, in the UK they are most commonly called simply "red peppers", "green peppers", "yellow peppers" or "orange peppers" (or "mixed peppers" for a bag of varying colours) and sometimes "sweet peppers" (though that is usually reserved for the long, pointed variety).
For example, searching "peppers" on Sainsbury's website produced: 183 results for ‘peppers’
In the USA they are generally called "bell peppers".
I don't know about the USA, but in the UK the word "paprika" is reserved for the spice.