Easily creates interwiki links to Wiktionary for Neapolitan-language terms. For instance, to link to a definition of the Neapolitan word {{Lang|nap|lìbbro}} (book), use <nowiki>{{wiktnap|lìbbro}}</nowiki>. Also inserts <nowiki>{{lang|nap|...}}</nowiki>wrapper around text to mark article as having Neapolitan-language text in it.