localization vs American spelling

localization and American spelling both are nouns.

Word	Noun	Adjective	Verb	Adverb
localization	Yes	No	No	No
American spelling	Yes	No	No	No

localization (noun)	American spelling (noun)
a determination of the place where something is	English orthography used in the United States (characterized by 'analyze', 'center', 'usable')
(physiology) the principle that specific functions have relatively circumscribed locations in some particular part or organ of the body