Multilingual Guide

March 6, 2026 · View on GitHub

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A compact field guide to stabilize multilingual RAG across CJK, RTL, mixed scripts, and locale drift. Use this page to check symptoms, apply structural fixes, and verify with measurable targets.


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Core acceptance

  • ΔS(question, retrieved) ≤ 0.45 across at least 2 languages
  • Coverage ≥ 0.70 for the target section in each language
  • λ remains convergent across three paraphrases in mixed scripts
  • E_resonance stays flat for long bilingual/RTL runs

Common multilingual failure modes

SymptomLikely causeOpen this
Retrieval drops snippets when query is in Chinese or JapaneseTokenizer mismatch (no whitespace segmentation)tokenizer_mismatch.md
Citations collapse when Arabic/Hebrew text mixes with EnglishScript directionality conflictscript_mixing.md
High similarity but meaning flips across localeLocale analyzer mismatch (stemming / stopwords)locale_drift.md
HyDE/BM25 retrieval different per languageQuery expansion language biashyde_multilingual.md

Fix in 60 seconds

  1. Probe with ΔS Run the same question in English and one target language. If ΔS differs by >0.15, suspect tokenization or analyzer mismatch.

  2. Apply λ_observe Paraphrase the query three ways in the non-English language. If λ diverges, enforce schema lock and re-index with language-specific analyzers.

  3. Structural repair


Diagnostic checklist

  • Tokenizer: verify segmentation strategy (whitespace vs character-level)
  • Analyzer: confirm stemming and stopword lists match query language
  • Scripts: normalize Unicode, check RTL/LTR flags
  • Locale drift: run same snippet under two locales, compare ΔS
  • Hybrid retriever: ensure rerankers operate on normalized embeddings

🔗 Quick-Start Downloads (60 sec)

ToolLink3-Step Setup
WFGY 1.0 PDFEngine Paper1️⃣ Download · 2️⃣ Upload to your LLM · 3️⃣ Ask “Answer using WFGY + <your question>”
TXT OS (plain-text OS)TXTOS.txt1️⃣ Download · 2️⃣ Paste into any LLM chat · 3️⃣ Type “hello world” — OS boots instantly

Explore More

LayerPageWhat it’s for
⭐ ProofWFGY Recognition MapExternal citations, integrations, and ecosystem proof
⚙️ EngineWFGY 1.0Original PDF tension engine and early logic sketch (legacy reference)
⚙️ EngineWFGY 2.0Production tension kernel for RAG and agent systems
⚙️ EngineWFGY 3.0TXT based Singularity tension engine (131 S class set)
🗺️ MapProblem Map 1.0Flagship 16 problem RAG failure taxonomy and fix map
🗺️ MapProblem Map 2.0Global Debug Card for RAG and agent pipeline diagnosis
🗺️ MapProblem Map 3.0Global AI troubleshooting atlas and failure pattern map
🧰 AppTXT OS.txt semantic OS with fast bootstrap
🧰 AppBlah Blah BlahAbstract and paradox Q&A built on TXT OS
🧰 AppBlur Blur BlurText to image generation with semantic control
🏡 OnboardingStarter VillageGuided entry point for new users

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