Should Raison D'etre Be Italicized?
Use of Italics Foreign Words (Including Unassimilated Latin Words) in English (Except for the Names of Persons, Places or Institutions) Should Be in Italics...
Use of italics
Foreign words (including unassimilated Latin words) in English (except for the names of persons, places or institutions) should be in italics, and any accent shown: diem clausit extremum, cause célèbre, raison d'être, mañana.
Is raison d'être italicized?
/ˌreɪzɒ̃ ˈdɛtrə/. This loanword from French (literally 'reason for being') is printed in italics, and with the circumflex accent on the letter ... ...
How do you write raison d être?
noun, plural rai·sons d'ê·tre [rey-zohnz -de-truh; French re-zawn -de-truh]. reason or justification for being or existence: Art is the artist's raison d'être.