These expressions show how to read Chinese characters, how to say something in another language, etc. Possible words for N include おんよみ(the on-reading of kanji), くんよみ(the kun-reading of kanji), and names of (foreign) languages.
この 字は くんよみでは 「みず」と よみます。
The kun-reading of this [Chinese] character is "mizu."
Good morningは 日本語で 「おはようございます」と 言います。
Good morning is "ohayoo gozaimasu" in Japanese.
