Command of language and Command language

Command language and command of language are semantically related In some cases you can replace phrase "Command language" with "Command of language", this phrases are similar.

Command language noun - A source language consisting of procedural operators that invoke functions to be executed.

Command of language and command language are semantically related in articulation topic. Sometimes you can use "Command of language" instead a noun phrase "Command language", if it concerns topics such as skillful way with words.