means the concept of itself is universal. In plain words, it simply means every language has a word that means "delicious", and everyone in the world likes something yummy rather than something yucky. (Another possible interpretation is "what is delicious in one country is also delicious in other countries", but this is a controvertible statement. I don't think everyone in the world understands the taste of _natto_. Still, the interpretation somewhat depends on the context.)
You don't need in a sentence like this. rather explicitly means "inside", and doesn't make much sense to me.
`(){/}` typically takes a person as the subject (see examples here), but it has broader usages. Similar phrases I came up with:
* Your possibility is limitless.
* This game has no ending.
* There is no justice in war (i.e., war is always wrong no matter what).
* There is no evil in war (i.e., everyone fights believing they are right).