The phrase "a second class language" is correct and usable in written English.
It can be used to describe a language that is perceived as less important or less prestigious compared to another language.
Example: "In some regions, local dialects are often viewed as a second class language compared to the national language."
Alternatives: "a lesser language" or "an inferior language".
Google also today announced that it is making Kotlin a first-class language for writing Android apps.
Google today announced that it is making Kotlin, a statically typed programming language for the Java Virtual Machine, a first-class language for writing Android apps.
Now that Kotlin is a first-class language for Android development, Google is obviously optimizing its compiler and for all apps, Google is also promising performance and efficiency improvements in its ART runtime.
It was only last year that Google elevated Kotlin to a first-class language in the Android ecosystem; 28 out of the top 100 apps in the Google Play store already use it.
Yet the fact that the addition of Kotlin as a first-class language for Android development got more applause than any other announcement at the show clearly shows what the core audience is (in the press boxes, that announcement mostly resulted in blank stares, of course).
What does it mean for a function to be a first class part of a language?
One of the first women to graduate from Oxford, she left in 1915 with a first class honours degree in modern languages.
He read "Macbeth" with his English as a second language class, a class in which there were a dozen students from nearly a dozen foreign countries, including the Dominican Republic, Poland, Peru and China.
This required us to make time a first-class element of the language.
She gained a first-class degree in English Language and Literature at the University of Glasgow and came to York to study social administration, after working in the library at Edinburgh University.
