Translation of "Vietnamese" in Chinese

Vietnamese is really hard to learn.

越南语真的难学。

I have French nationality but Vietnamese origins.

我是法国籍的，但我是越南人。

She is learning both Vietnamese and English.

她既学越语又学英语。

It wasn't in Vietnam that I learnt Vietnamese.

我的越南语不是在越南学的。

I have a Vietnamese friend. Her name is Tiên.

我有越南朋友。她叫仙。

Americans call it the Vietnam War; the Vietnamese call it the American War.

美国人称之为越南战争，而越南人称之为美国战争。