Sometimes two more categories are also used, for a total of five categories: "teichōgo" (丁重語) "courteous language" and "bikago" (美化語), "word beautification", but more often these are included in the above three: teichōgo as a kind of kenjōgo (humble), bikago as a kind of teineigo (polite)—these two other categories use the same forms as the general categories, but are used in different contexts, hence differentiated by some linguists.