personalise vs modify

personalise and modify both are verbs.

Word	Noun	Adjective	Verb	Adverb
personalise	No	No	Yes	No
modify	No	No	Yes	No

As verbs, modify is a hypernym of personalise; that is, modify is a word with a broader meaning than personalise:

Other hypernyms of personalise include alter, change.

personalise (verb)	modify (verb)
make personal or more personal	make less severe or harsh or extreme
	add a modifier to a constituent
	cause to change; make different; cause a transformation