🌎 DialectOS

TL;DR: DialectOS — open-source MCP server and CLI for translating and QA-checking content across 25 regional Spanish variants. Best for AI agents, documentation teams, and app developers localizing into Spanish.

A Model Context Protocol server built specifically for Spanish dialects.

DialectOS is an open-source Spanish dialect translation server that runs as an MCP (Model Context Protocol) tool and CLI. It translates English and other languages into 25 regional Spanish variants — Mexican, Argentinian, Colombian, Puerto Rican, and more — while preserving markdown structure, enforcing glossary terms, and applying adversarial quality gates that catch semantic drift before it reaches users.

Translate, detect, and adapt content across 25 regional Spanish variants while preserving markdown structure, code comments, and locale file formatting.

📖 Documentation · 🚀 Quick Start · 🛠️ MCP Tools · Agent Skill · 📦 Packages · 🤝 Contributing · 📋 Roadmap

Public Discovery

DialectOS is a Spanish localization and dialect QA system for AI agents, documentation teams, app developers, and support organizations. It provides MCP tools, CLI workflows, glossary enforcement, locale-file validation, and adversarial quality gates for regional Spanish variants.

AI discovery: llms.txt provides a compact project summary for AI assistants and search crawlers.

Best-fit searches: Spanish dialect translation MCP server, Spanish localization QA, Model Context Protocol translation tool, i18n validation CLI, regional Spanish translator, glossary enforcement, AI localization audit, Spanish launch certification.

Related MCP server: nativ-mcp

Agent Skill

DialectOS includes a public agent skill at skills/dialectos/SKILL.md. Use $dialectos in compatible agent hosts when you want an agent to choose the right MCP or CLI workflow for regional Spanish translation, markdown preservation, locale-file validation, glossary enforcement, register checks, and launch-readiness QA.

Spanish Launch Certification

DialectOS is available as a paid Spanish localization launch audit. We certify your Spanish docs, app strings, support macros, or locale files across target dialects and deliver an MQM-aligned launch-readiness report.

• Beta pilot: $500

• Scope: up to 10,000 source words and 5 target dialects

• Deliverables: certification report, issue list, severity table, recommended fixes, launch decision

• Sample report: audits/sample-customer-report.md

• Offer details: docs/spanish-launch-certification.md

✨ What makes DialectOS different?

Coverage is not equal across the 25 variants. es-AD, es-BZ, es-PH, es-GQ and es-US are experimental: their profiles lean on contact-language markers (Catalan, Kriol, Tagalog, English) and have thinner vocabulary and test data than the major variants.

Dialect detection is a keyword heuristic. Its last recorded top-1 accuracy was 54.8% on the bundled detection corpus, and that corpus was written from the detector's own keyword lists, so the figure is not an independent measure. Treat detect_dialect output as a hint, not a verdict.

🎯 Why this exists

"We shipped a product to Mexico using our Spain Spanish translations. Users thought we were being intentionally rude."

Spanish is not one language — it's 25 regional variants with different vocabulary, formality levels, slang, and grammatical preferences. Existing translation tools treat Spanish as a monolith.

DialectOS solves this by:

• Understanding regional differences (es-MX vs es-ES vs es-AR vs es-CO...)

• Preserving technical document structure during translation

• Providing glossary enforcement for consistent terminology

• Adding semantic context, dialect grammar profiles, quality contracts, and quality gates that catch drift before it reaches users

• Running as an MCP server so AI assistants can translate natively

🚀 Quick Start

Install note: DialectOS v0.3.2 is distributed as GitHub Release tarballs. GET https://registry.npmjs.org/@kyanitelabs/dialectos and GET https://registry.npmjs.org/dialectos both return 404 — there is no npm package. The CLI and MCP tarballs bundle the unpublished @dialectos/* workspace packages, so a single pnpm add -g / pnpm dlx of the tarball URL works. Clone the repo only for local development or the browser demo.

MCP setup

Add the released MCP server to Claude Desktop, Cursor, or any MCP client:

{
  "mcpServers": {
    "dialectos": {
      "command": "pnpm",
      "args": [
        "dlx",
        "https://github.com/KyaniteLabs/DialectOS/releases/download/v0.3.2/dialectos-mcp-0.3.2.tgz"
      ],
      "env": {
        "LLM_API_URL": "https://your-llm-gateway/v1/chat/completions",
        "LLM_MODEL": "your-dialect-capable-model",
        "LLM_API_KEY": "your-key-if-required",
        "LLM_API_FORMAT": "openai",
        "ALLOWED_LOCALE_DIRS": "/path/to/locales"
      }
    }
  }
}

ALLOWED_LOCALE_DIRS is a comma-separated list of the only directories the server may read or write; when set, it replaces the working directory. Without it the server falls back to its working directory, but never to / or your home directory, so set it when your client starts servers from either.

For local development from a source checkout, run pnpm build and point your MCP client at packages/mcp/dist/index.js.

Full-app browser demo

The browser demo requires a source checkout.

The browser demo is no longer a fake/static rule replacer. It calls a local DialectOS backend, and that backend calls the configured provider stack.

LLM_API_URL="http://127.0.0.1:1234/v1/chat/completions" \
LLM_API_FORMAT="openai" \
LLM_MODEL="your-local-model-name" \
LLM_ALLOW_LOCAL=1 \
pnpm demo

Open http://127.0.0.1:8080.

For the beginner container walkthrough, see docs/full-app-demo.md.

Recommended certified models

For v0.3.0, the recommended default cloud model is glm-4.5-air through the Z.ai international Anthropic-compatible endpoint. It passed basic, expanded adversarial, and long-document certification. Use glm-5.1 when you want the higher-confidence/premium option, and qwen3.5-9b via LM Studio for local/offline certification.

export LLM_API_URL="https://api.z.ai/api/anthropic/v1/messages"
export LLM_MODEL="glm-4.5-air"
export LLM_API_FORMAT="anthropic"
export LLM_API_KEY="..."

LM Studio local model testing

Start LM Studio's local server, then point DialectOS at any downloaded local model. LLM_API_FORMAT=lmstudio uses LM Studio's native REST API and loads the model just-in-time when needed.

LM_STUDIO_URL="http://127.0.0.1:1234" \
LLM_MODEL="publisher/model-key-or-api-identifier" \
LLM_API_FORMAT="lmstudio" \
pnpm dialect:eval -- --live --provider=llm --out=/tmp/dialectos-lmstudio-eval

Incremental provider certification

Use dialect:certify for long local-model or cloud-provider runs. It writes events.jsonl, progress.json, and an incrementally updated results.json after every sample, with per-sample timeout protection.

LM_STUDIO_URL="http://127.0.0.1:1234" \
LLM_MODEL="qwen3.5-9b" \
LLM_API_FORMAT="lmstudio" \
pnpm dialect:certify -- --live --provider=llm --sample-timeout-ms=300000 --out=/tmp/dialectos-certify

Adversarial dialect certification

Use dialect:certify:adversarial to run paraphrase, dialect-collision, taboo-copy, placeholder, register, and repeatability traps. It wraps dialect:certify and writes a failure-matrix.md plus aggregate repeatability results.

pnpm dialect:certify:adversarial -- --live --provider=llm --repeat=2 --sample-timeout-ms=300000 --out=/tmp/dialectos-adversarial

Long-document certification

Use dialect:certify:documents to certify README/API-doc/locale JSON flows, not just sentence fixtures. It checks markdown structure, placeholders, URLs, code fences, API tables, and locale JSON outputs.

pnpm dialect:certify:documents -- --live --provider=llm --dialects=es-MX,es-PA,es-PR --out=/tmp/dialectos-doc-cert

Customer-facing certification report

Use dialect:report to turn certification artifacts into a customer-facing Markdown deliverable for paid launch audits.

pnpm dialect:report -- --input=audits/release-candidate-2026-04-22/model-matrix.json --out=customer-report.md --customer="Acme SaaS" --product="Spanish launch"

CLI install

# Install the v0.3.2 CLI tarball from the GitHub Release
pnpm add -g https://github.com/KyaniteLabs/DialectOS/releases/download/v0.3.2/dialectos-cli-0.3.2.tgz

# Or use a local source checkout
pnpm install --frozen-lockfile
pnpm build

# Translate to Mexican Spanish
dialectos translate "Hello world" --dialect es-MX

# Translate a README preserving structure
dialectos translate-readme README.md --dialect es-AR --output README.ar.md

# Validate an existing translation
dialectos validate --source "Click the button" --translated "Haz clic en el botón" --dialect es-MX

# Validate translation files
dialectos validate --source-file en.json --translated-file es-MX.json --dialect es-MX --format json

# View translation corpus statistics
dialectos corpus stats

# Run dialect quality benchmark
dialectos benchmark run --dialects es-MX,es-AR,es-ES

# Generate glossary suggestions from corrections
dialectos glossary suggest --min-occurrences 3

# Compare two glossary versions
dialectos glossary diff glossary-v1.json glossary-v2.json

# Detect missing i18n keys
dialectos i18n detect-missing ./locales/en.json ./locales/es.json

# List all supported dialects
dialectos dialects list

From source

git clone https://github.com/KyaniteLabs/DialectOS.git
cd DialectOS
pnpm install
pnpm build
pnpm test        # 1,500+ tests passing

🛠️ MCP Tools

Markdown Translation (4 tools)

i18n Operations (6 tools)

Translation (7 tools)

📦 Packages

1,500+ tests across 7 packages plus docs contracts, demo-server contracts, and static-hardening checks

Package versions above match the latest GitHub release, v0.3.2.

🛡️ Security & Quality

DialectOS has undergone adversarial security hardening:

• Known dependency advisories patched with pinned overrides (see CHANGELOG)

• SSRF protection on all provider endpoints

• Circuit breaker with half-open probe locks

• Atomic checkpoint writes with schema versioning

• HTML injection detection in translated output

• Semantic drift scoring — catches "looks valid but meaning changed"

• Provider capability negotiation — validates language support before API calls

• Chaos harness for deterministic resilience testing

See SECURITY.md for details.

🎨 Supported Dialects

...and 12 more. Full list via dialectos dialects list.

🏗️ Architecture

┌─────────────────────────────────────────────────────────────┐
│                        MCP Client                            │
│              (Claude Desktop / Cursor / etc.)                │
└──────────────────────┬──────────────────────────────────────┘
                       │ stdio
┌──────────────────────▼──────────────────────────────────────┐
│                   @dialectos/mcp                               │
│              18 tools • JSON-RPC over stdio                  │
└──────────────────────┬──────────────────────────────────────┘
                       │
┌──────────────────────▼──────────────────────────────────────┐
│                   @dialectos/cli                               │
│   translate • validate • corpus • benchmark • glossary     │
│   ├─ Policy profiles (strict/balanced/permissive)           │
│   ├─ Quality gates (token/glossary/structure/semantic)      │
│   ├─ Translation corpus + auto-glossary                     │
│   └─ Checkpoint resumption + telemetry                      │
└──────────────────────┬──────────────────────────────────────┘
                       │
┌──────────────────────▼──────────────────────────────────────┐
│                @dialectos/providers                            │
│   ┌─────────┐  ┌─────────────────┐  ┌─────────────────┐    │
│   │   LLM   │  │     DeepL       │  │ Libre/MyMemory │   │
│   │ Primary │  │ Paid fallback   │  │ Generic fallback│    │
│   └─────────┘  └─────────────────┘  └─────────────────┘    │
│        │                │                    │              │
│        └────────────────┴────────────────────┘              │
│              Circuit Breaker + Rate Limiter                  │
└─────────────────────────────────────────────────────────────┘

📊 Quality Gates

Every translation passes through 4 quality dimensions:

Quality Score = tokenIntegrity×25% + glossaryFidelity×30% + structureIntegrity×20% + semanticSimilarity×25%

❓ FAQ

What is DialectOS? DialectOS is an open-source translation engine for Spanish regional dialects. It runs as an MCP server (for AI assistants like Claude) and a CLI tool for developers.

How is DialectOS different from Google Translate? Google Translate treats Spanish as one language. DialectOS understands 25 regional variants, preserves markdown structure, enforces glossaries, and applies quality gates that catch errors before they reach users.

What are Spanish dialects? Spanish varies significantly by country. Mexican Spanish uses "carro" for car; Spain uses "coche"; Argentina uses "auto". DialectOS handles these differences automatically.

Does DialectOS work with ChatGPT / Claude? Yes. DialectOS is an MCP server, so Claude Desktop, Cursor, Windsurf, and other MCP clients can use its 17 translation tools natively.

Is DialectOS free? Yes. DialectOS v0.3.2 is released under Apache-2.0. See LICENSE for details.

What is MCP? Model Context Protocol is an open standard that lets AI assistants use external tools. DialectOS exposes 17 translation tools through MCP so AI agents can translate natively.

Can I use DialectOS for commercial projects? Yes. Apache-2.0 allows commercial use, modification, and redistribution subject to the license terms. See LICENSE for details.

How accurate is the translation? DialectOS applies 4 quality gates (token integrity, glossary fidelity, structure integrity, semantic similarity) and adversarial tests. Automated tests verify correctness across dialects.

🏷️ Badges

Add this badge to your project if you use DialectOS for translation:

[![Translated with DialectOS](https://img.shields.io/badge/translated%20with-DialectOS-d89b2b)](https://github.com/KyaniteLabs/DialectOS)

⚡ GitHub Action

Validate Spanish translations in CI on every pull request:

- uses: KyaniteLabs/DialectOS@v0.3.2
  with:
    dialect: es-MX
    source-dir: locales/en
    target-patterns: 'locales/es-MX/*.json'
    fail-on-blocking: true

Multi-dialect matrix:

strategy:
  matrix:
    dialect: [es-ES, es-MX, es-AR, es-CO]
steps:
  - uses: KyaniteLabs/DialectOS@v0.3.2
    with:
      dialect: ${{ matrix.dialect }}
      fail-on-blocking: true

See docs/github-action.md for full configuration options.

🤝 Contributing

We welcome contributors! See CONTRIBUTING.md for:

• Setting up your development environment

• Running the test suite

• Submitting pull requests

• Code style guidelines

Good first issues are tagged with good first issue — perfect for newcomers.

📋 Roadmap

See ROADMAP.md for upcoming features including:

• Portuguese dialect support (pt-BR, pt-PT)

• Real-time collaborative translation

• Custom provider plugins

• OpenAI-compatible, Anthropic-compatible, and LM Studio local gateways via LLM_API_URL/LM_STUDIO_URL + LLM_MODEL + LLM_API_FORMAT

• VS Code extension

📄 License

Apache-2.0 — see LICENSE for details. Dated relicensing history of published releases: LICENSING.md.

Made with ❤️ by KyaniteLabs and contributors.

Star ⭐ this repo if it helps your project!

Part of KyaniteLabs

More from KyaniteLabs. Related projects:

• kinocut — guardrailed video-editing MCP server for AI agents (formerly mcp-video)

• Epoch — time-estimation MCP server (PERT) for AI agents

• checkyourself — local-first production-readiness checks for AI-built code

→ More at kyanitelabs.tech

What is DialectOS?

DialectOS is an open-source Spanish dialect translation server that runs as an MCP tool and CLI. It translates into 25 regional Spanish variants while preserving markdown structure, enforcing glossary terms, and applying adversarial quality gates that catch semantic drift.

Who it's for

• Primary: AI agents, documentation teams, app developers, and support teams localizing into regional Spanish

• Use when you need to translate or validate content for specific Spanish dialects while preserving markdown and locale-file structure and enforcing glossaries

• Skip if you need a general-purpose machine-translation API for many languages

FAQ

What is DialectOS?

DialectOS is an open-source Spanish dialect translation server that runs as an MCP tool and CLI. It translates into 25 regional Spanish variants while preserving markdown structure, enforcing glossary terms, and applying adversarial quality gates that catch semantic drift.

Who should use DialectOS?

AI agents, documentation teams, app developers, and support teams localizing into regional Spanish.

How is DialectOS different?

Unlike generic machine translation, DialectOS treats Spanish as 25 regional variants and gates output on token, glossary, structure, and semantic checks.

Is DialectOS production software?

Treat the README status and release tags as source of truth for maturity. Validate against your own requirements before production use.

Status

• Maintained as of 2026 on the default branch

• Prefer release tags when pinning dependencies

• Report issues on GitHub

Agent surface

• Coding agents: read this README first, then repo docs/AGENTS.md if present

• Prefer machine-readable briefs (llms.txt) when the repo ships one

• MCP or skill entrypoints are documented in-repo when applicable

Contributing

Issues and PRs welcome on GitHub. Keep public docs free of secrets and machine-local paths.

License

See LICENSE in this repository (or package metadata if license is package-only).