1.
Chinese language
The Chinese language, including its various dialects such as Mandarin and Cantonese. In most contexts refers to Modern Standard Chinese (Mandarin).
中国語を勉強しています。
I'm studying Chinese.
中国語の発音は難しい。
Chinese pronunciation is difficult.
大学で中国語と英語を専攻しました。
I majored in Chinese and English at university.
FORMATION:
中国 (China) + 語 (language). The suffix ~語 is used to form language names: 日本語 (Japanese), 英語 (English), 韓国語 (Korean).
USAGE:
In everyday speech, 中国語 usually refers to Mandarin (普通話). For Cantonese, 広東語 is used separately.