This study reconstructs the development of DIN SPEC 33429 (Guidance for German Easy Language) from publicly available sources and analyzes the social significance of formalizing easy-to-understand language.It addresses three questions: (1) To what extent did the publication of DIN SPEC 33429 materially strengthen the social standing of Deutsche Leichte Sprache? (2) When, and under what arrangements, was the participation of people with intellectual disabilities agreed upon?(3) Why did nearly two years elapse between the draft (2023) and the final version (2025) ?To complement the limitations of documentary evidence, this study proposes a design that makes non-public negotiation processes testable: semi-structured interviews linked to propositions derived from document analysis, triangulated with a timeline and differential readings of draft and final clauses.The contribution is twofold: a documentary reconstruction of the process and a method that enables falsifiable examination of decision-making and participation.The findings and the proposed design offer implications for institutional design in Japan's kysei (inclusive) society, especially in sustaining participant involvement and clarifying rights-based concepts in information accessibility.
Mika Kii (Fri,) studied this question.
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