The phrases “en route” and “en suite” are French loanwords that are commonly used in English; therefore, their origin is French. En route: IPA: /ɒn ruːt/ (ON root) En suite: IPA: /ɒn swiːt/ (ON sweet) En masse: IPA: /ɒn mæs/ (ON mass) Note: They have slightly different pronunciations in French. The difference is the French nasalised vowel /ɒ̃/. In French, the final N in EN is not pronounced but the preceding vowel is pronounced in a nasal manner, similar to the way vowels are pronounced in Engli