She was a master of the English language.

她曾是一名英语语言专家。

《柯林斯英汉双解大词典》

She has mastered a foreign language by the aid of a grammar and dictionary.

她借助语法书和词典掌握了一门外语。

youdao

She has a good command of the Spanish language.

她精通西班牙语。

《牛津词典》

She has studied the social meaning of American Sign Language as well as the Al-Sayyid Bedouin Sign Language in Israel.

VOA: special.2010.10.01

She doesn't know any language, She doesn't know what I would be talking about by the nature of love.

它没有语言，它不知道我会谈论,爱的天性。

麻省理工公开课 - 电影哲学课程节选

She says government has to be involved in requiring clear language because the marketplace has not dealt with the problem.

VOA: special.2010.04.30

When she heard Welsh spoken on the film, she fell in love with the language, and decided to try and learn it.

BBC: NEWS | UK | Wales | US Welsh teacher inspired by Ioan

Over the weekend, Sarah Palin tweeted out something similar, but the language that she used was very specific.

WHITEHOUSE: Press Briefing

But even near the end, when she'd lost command of language, she'd mouth the words to "Dayenu" with a smile on her face.

WSJ: Passover Challenged