The phrase "a central language" is correct and usable in written English.
It can be used to refer to a language that holds a primary or significant role in a particular context, such as communication, culture, or education.
Example: "In this multilingual country, English serves as a central language for business and government."
Alternatives: "a primary language" or "a key language".
The Shoshone language is a Central Numic language of the Uto-Aztecan family.
On the other hand, languages in central Africa, such as the western dialect of Lugbara (a Central Sudanic language spoken in the border area of the Democratic Republic of the Congo and Uganda and bordering on highly tonal Niger-Congo languages), sometimes distinguish between as many as four tonal levels.
Pure alexia is an acquired reading disorder that spares central language abilities.
Top of the list came ilunga, a word in Tshiluba (a central African language) for a person who tolerates abuse only twice.
The company, including assistant director Andrew Muir and creative interpreter Kate Furby, translated the language of the play into modern English and then into a suitably theatrical version of BSL; while BSL is the central language, each supports the other.
As his purpose is to communicate with readers across Nigeria, he uses "the one central language enjoying nationwide currency".
The Nakho-Dagestanian languages are a complex group, sometimes subdivided into Nakh, or Central, languages and Dagestanian, or East Caucasian, languages.
English as a Foreign Language (EFL) proficiency of non-native speakers on the other hand is often measured against the CEFR, which plays a central role in language policy and educational standardization in Europe and beyond (e.g., National Educational Standards in Germany; cf. Köller et al. 2010).
Harrington's vast Nachlass is today playing a central role in language revitalization and tribal recognition efforts of contemporary Native Californians, even as its contents, and its compiler, remain at least partly lodged in those same Romantic tropes of the Sublime (as was Harrington's own self-image, perhaps): limitless, forbidding, impenetrable.
In the semiotic theory of Ferdinand de Saussure, the father of modern linguistics, a central component of language is its arbitrariness.
