Linguistic purism in the Korean language is the belief that words of native Korean origin should be used in place of foreign-derived "loanwords". This belief has been the focus of movements in both North and South Korea, where adherents have sought to deter the use of loanwords, regardless of whether they have been formally adopted into the Korean language. Of primary interest has been the replacement of Japanese-influenced loanwords (especially from the period of Japanese forced occupation) when the Korean language faced multiple hardships and was discouraged in favor of Japanese, although the specific policies differ between the North and South.