He delivered his speech in French.

他用法语作的演讲。

《柯林斯英汉双解大词典》

In French the adjective must agree with the noun in number and gender.

法语中形容词必须在数和性上与名词一致。

《牛津词典》

He gently coached me in French.

他和蔼地辅导我法语。

《柯林斯英汉双解大词典》

(Music: "C'est Si Bon") "C'est Si Bon," or "It's So Good" in French, was one of Eartha Kitt's first hit songs.

VOA: special.2009.06.07

I think it was in French, so it wasn't really hitting all the scientific community of the time in any major way.

我印象中是发表在一个法语杂质上，所以它并没有在当时的科学界的,主流领域中取得反响。

麻省理工公开课 - 化学原理课程节选

And you're not counted off for errors that you make in writing, either, if you're writing in French; and it really rocks, trust me.

你在写作里有错,也不会扣分的,如果你用法语写的话,而且这么着可带劲了,真的

耶鲁公开课 - 1871年后的法国课程节选

The film is in French, and that is a bold move on his part.

NPR: A Beautiful Movie: 'The Diving Bell and the Butterfly'

The Colombians munch on dangerously strange hot dogs blanketed in French fries and mashed potatoes.

BBC: Multicultural Miami

"I didn't read the story because it was in French or something, " Mr. Duggar said.

WSJ: The Boys on Le Bus: Foreign Press Mines Local Angles in U.S. Primary