Adjectival levels of speech
In the Japanese language, adjectives have three different 'levels', plain, polite, and super-polite forms or 'levels' of speech. The plain form is used when among family and friends, as well as publications. The polite form is used when adults are not friends with those they are speaking to. While with the super-polite form is rarely utilized by younger people, except when required, such as ohayō gozaimasu おはようございます (good morning).
Plain form: 面白い「おもしろい」。、Omoshiroi.・It is interesting.
Polite form: 面白いです「おもしろいです」。、Omoshiroi desu.
Super-polite form: 面白うございます