The phrase "a command of language" is correct and usable in written English.
It can be used to describe someone's proficiency or skill in using a language effectively.
Example: "Her command of language allows her to express complex ideas clearly and persuasively."
Alternatives: "mastery of language" or "proficiency in language".
There was an authenticity to the voice and a command of language that was instantly apparent.
You will require a command of language, an ability to select the right word and phrasing, with economy usually, but always precision.
"I felt it in Beyond The Fringe when I first came across Jonathan and Peter – Britten's reserve and sense of being smothered by Auden and the way Auden was so articulate, and had a command of language, I sympathise with".
The flamboyant Oscar Fingal O'Flahertie Wills Wilde and the ascetic George Bernard Shaw were temperamental opposites, but the two Dublin-born writers shared gifts of wit, intellect and a command of language that helped shape the modern stage.
This, in turn, entails that if there are those who show academic prowess, they should be given the tools, such as a command of language and rational argument, with which they can progress, and they should sit examinations, success in which will prove to the world that they are good at their work.
He has a command of language which provokes envy among more stilted and struggling orators.
One expat, Cathy Jones, wrote: "I agree that too many expats live here for years in a bubble without a command of the language beyond nasi goreng [fried rice]..
Direct, concise and evocative, this sentence forever puts to rest any criticism that George W. Bush does not possess a command of the language.
Now, in Oldham at least, any work to be had is in offices or banks or dry cleaners, where a command of the language is far more important than in a textile mill.
He has a command of the language about "social" and the "cloud" that resonates with business.
Again, given that Mara was a fairly confident writer and wrote with a command of academic language, achieving such a dialogic paragraph may be considerably easier for her to do than the participants who struggled with academic language.
