The Rheinische Dokumenta is a phonetic writing system developed in the early 1980s by a working group of academics, linguists, local language experts, and local language speakers of the Rhineland. Wikipedia

A phonetic writing system of West German Platt languages Wikipedia Disambiguation

Phonetic writing system Wikidata

A phonetic script, or writing system, designed in the 1980s for the so called Rhinelandic languages in the West Central German group of languages, and some neighboring ones, derived from the variant of the modern Latin script predominant in Germany, Luxembourg, and East Belgium. OmegaWiki