In linguistics, attested languages are languages (living or dead) that have been documented and for which the evidence has survived to the present day. Evidence may be recordings, transcriptions, literature or inscriptions. In contrast, unattested languages may be names of purported languages for which no direct evidence exists, languages for which all evidence has been lost or hypothetical proto-languages proposed in linguistic reconstruction.
Within an attested language, particular word forms which are directly known to have been used – because they appear in the literature, inscriptions or documented speech – are called attested forms. These contrast with unattested forms, which are reconstructions hypothesised to have been used based on indirect evidence (such as etymological patterns). In linguistic texts, unattested forms are commonly marked with a preceding asterisk (*).
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