CVNSS4.0 AS AN EXPERIMENTAL ORTHOGRAPHIC-AUDIT WRITING MODEL FOR VIETNAMESE: VOWEL TRANSFORMATION, JESUIT MISSIONARY LINGUISTICS, AND DOMAIN-SPECIFIC AI/NLP/LLM INFRASTRUCTURE

Abstract

This article proposes CVNSS4.0 as an experimental orthographic-audit writing model for Vietnamese rather than as a replacement for Quốc Ngữ. The model is framed as a machine-readable intermediate representation that decomposes Vietnamese syllables into onset, rhyme/nucleus, coda, tone, and audit metadata. The central argument is that the double transformation of the rhyme in CVNSS4.0—first from visually diacritized Quốc Ngữ vowels into structural vowel modules, and then into linearized glide-aware codes such as j/w plus tone and coda markers—belongs to a broader cross-linguistic pattern in which writing systems externalize phonological layers for literacy, missionization, administration, and now computational processing. The study places CVNSS4.0 in a four-century continuum beginning with Jesuit and missionary grammars in Vietnamese, Tupi, Guaraní, Quechua, and Aymara, and compares it with representative scripts and orthographies from Africa, the Americas, East Asia, and Southeast Asia. A conceptual research design is proposed for evaluating roundtrip accuracy, audit completeness, tone preservation, OCR/ASR robustness, and downstream AI/NLP/LLM utility. The article concludes that CVNSS4.0 should be investigated as an explainable preprocessing and audit layer for Vietnamese language infrastructure, especially for domain-specific corpora, dictionaries, administrative records, and low-resource model training.

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