DanielDrucker What about character differences inside words, presence of say dash character or punctuation included as a part of the word, or recognizing letters like a vs ä. In addition there are many ways to interpret what words are, even without going into differences in all possible languages.
This is why if exact match is to become not-so-exact match, very clear rules need to be suggested (and preferably agreed upon by the kagi user community). Otherwise not using quotes already allows relaxed rules by default without any intervention.