Definition of northernization in English:
northernization
(also northernisation)
adjective ˌnɔːðənʌɪˈzeɪʃnˌnɔːð(ə)nʌɪˈzeɪʃn
US The process of making northern in character.
Origin
1930s; earliest use found in William and Mary College Quarterly History Magazine. From northernize + -ation.