MediaWiki:Wikibase-listdatatypes-monolingualtext-body/en

Literal data field for a string that is not translated into other languages. This type of string is defined once and reused across all languages. Typical use is a geographical names written in the local language, an identifier of some kind, a chemical formula or a Latin scientific name.
 * language – explicit value for identifying the language for the text part
 * value – explicit value for the language specific variant string