Decipherment of the Rohonc Codex: The BC-R Formal Framework

This preprint presents the BC-R (Brandon-Caillahua Rohonc) formal framework for the systematic decipherment of the Rohonc Codex, a long-standing undeciphered illustrated manuscript. The proposed approach defines an explicit graphemic inventory, agglutinative morphological system, and context-free grammar, optimized through evolutionary computation and validated using quantitative linguistic metrics (Zipf distributions, KL divergence, and symbol stability analysis). The framework demonstrates internal linguistic coherence, statistically significant deviation from random symbol generation, and consistent semantic–iconographic correlation across multiple folios. Extended sample translations are provided to illustrate the generative capacity of the model and its interpretability within a plausible medieval linguistic context. This work establishes a reproducible and falsifiable formal system for Rohonc analysis and serves as the foundational manuscript for subsequent blind external validation on held-out folios.