Add Láadan language (ldn) to monolingual codes and to the list of language codes supported for lexeme values.
There is a Wikipedia Incubator in it: Wp/ldn/Main Page
It is needed for lexemes and for toponyms from the language in mainspace -- for instance, name (P2561) of Arkansans (Q100699808)
The alphabet is a variant of Latin, with native label "Láadan".
Previous discussion:
Wikidata:Contact the development team#Adding a new language code, ISO 639-3: ldn (Request)