"prevalent language" is a correct and usable phrase in written English.
It typically refers to a language which is widely spoken or used in a particular area, and is often used to compare the prevalence of one language to another. For example: "In the United Kingdom, English is the most prevalent language, with Welsh, Scottish Gaelic and Irish also spoken in certain areas."
Object Constraint Language (OCL) is the most prevalent language to document system constraints that are annotated in the Unified Modeling Language (UML).
Rage-baiting is commonplace and infuriatingly successful, so the most prevalent language of the Internet is at its best cynicism and its worst outright meanness.
The language police will also pose as travellers at eight airports across Canada and ask for service from security staff and retailers in whatever is the less prevalent language in that particular city.
In 1931 Romulo was made editor in chief of TVT Publications, comprising three newspapers, one in English, one in Spanish, and one in Tagalog (the second most prevalent language in the Philippines).
HTML 5 is the most prevalent language for app designers - when written in this computer language, it means you can access your favorite app from any web-enabled device you own... it's the first real shot in the bow that's made a dent in terms of creative destruction across those devices.
Yoruba was the most prevalent language (75.2%), followed by Igbo (18.1%).
SystemVerilog and VHDL are the two prevalent languages, and they are covered side-by-side in this book.
The self-report questionnaires were translated into the most prevalent languages of the adolescents.
These languages were chosen as they were the other most prevalent languages spoken at home by TOMIS and TOMIS II participants.
The Hopkins Symptom Checklist-37 for Adolescents (HSCL-37A), Stressful Life Events (SLE), and Reactions of Adolescents to Traumatic Stress (RATS) questionnaires were translated into the most prevalent languages of URMs in the Netherlands.
The informed consent and study instruments were provided in either English or Yoruba (the most prevalent indigenous language in Ibadan) to accommodate participants who did not speak English fluently, although English is the official language spoken in Nigeria.
