nativize
/ˈneɪtɪvʌɪz/(also nativise)
verb
1 [with object] Linguistics. To adapt (a loan word) to the phonetic structure of the native language; to develop (a pidgin language) into a creole used as a first language.
2 [with object] To make native in character; to assimilate to the native culture, etc.
Origin
1940s; earliest use found in Language. From native + -ize.