"obsolete language" is correct and usable in written English.
It can be used to refer to a language that is no longer in common usage, or to a language that is no longer spoken or written. For example, "Latin is an obsolete language; it is no longer widely spoken or used for writing."
Steeped in the obsolete language of revolutionary art, Mr. Finn's meticulous, deadpan mockumentaries often play like unearthed artifacts from an alternate universe.
"I thought this was one of those feel-good bills," said Linda Coleman, a Democratic state senator who is black and voted for the bill despite caring little about obsolete language in the Constitution.
With the appearance of a man from Aurora's past, the film travels to the misty mountainside plains of a Portuguese colony in Africa decades earlier to tell the story of a bygone romance in the obsolete language of an old movie.
Chances are, though, there should be subtitles, because all of the contestants were talking in Washingtonspeak, an obsolete language, where most of the words translate into the exact opposite of what normal people think they mean.
While it was hailed as a marvel when it was introduced decades ago, much of it is written in obsolete computer language and the agency has been slow to provide updates.
Government programmers were also still writing code in COBOL -- an obsolete computer language developed in the 1950s and still used by some government agencies, Frommann said.
The characters of this font were adapted from the alphabet of an obsolete Anatolian language (Melchert 2004).
The application is written in an obsolete programming language (MUMPS), and the basic application is thus not easily editable, which does not allow implementers to remove references to 'the veteran' or change other functionalities appropriate to in-hospital care of veterans.
Even this late into the Internet age, many big companies struggle over what to do with millions of lines of code written in obsolete software languages from the 1980s and earlier.
Research into Greenlandic as used by the younger generation has shown that the use of ergative alignment in Kalaallisut may be becoming obsolete, converting the language into an nominative accusative language.
A million years from now, a collection of mysterious artifacts would remain to puzzle whatever alien beings might stumble upon them: the flooded tunnel under the English Channel; bank vaults full of mildewed money; obelisks warning of buried atomic waste (as current law requires) in seven long-obsolete human languages, with pictures.
