Multilanguage during upgrade for English(United St

hi i am upgrading nf-260 to attain-360. the code base of both the version is English(United States). My doubt is that do i have to run the Multilangue procedure during upgrade to make the customized database multilanguage enabled. Or since the 2.60 version is in English(United States) , it will be multilanguage enabled by default. Wr sam