provided by Alconost localization services provider

From the team behind Alconost — professional localization since 2004
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अ

Building the Future of Localization

Alconost.MT is a laboratory of Alconost where we design and validate new language technology, combining software engineering and linguistics with AI and 20+ years of localization expertise.

Evaluate

AI-Powered

Evaluate and fix the quality of translation using top-tier LLMs.

LLMs identify specific error types in the translation (accuracy, fluency, etc.) and assess their severity to generate quality scores.

Key features

  • Translation errors annotation (types, severities)
  • Corrected translations and detailed error explanations
  • Segment and document level translation quality scores
  • Customizable prompt for Context, Style Guide, and Glossary support
  • Online and PDF reports
  • Import/export for CSV and direct text entry
  • Selection of SOTA LLMs for evaluation
100%

Annotate translation errors using the MQM framework — the industry-standard methodology for translation quality evaluation.

Built for LLM evaluation, machine translation benchmarking, and human-in-the-loop QA workflows.

Key features

  • Error-based MQM taxonomy (accuracy, fluency, terminology, style, and more)
  • Segment-level and document-level annotations with scores
  • Annotation data export in CSV/TSV and JSON formats for analysis and benchmarks
  • Online and PDF reports with adjustable error weights and pass/fail thresholds
  • API for import/export to automate human-in-the-loop pipelines Agentic

Extract Glossaries with NLP + LLM

Upload JSON, XLIFF, Excel, CSV or plain text and get a production-ready terminology glossary in minutes.

Key features

  • Hybrid NLP + LLM pipeline (spaCy, HanLP + GPT-4o, Claude, Gemini)
  • 100+ languages via HanLP neural models
  • Auto-extract translations from bilingual TM files (XLIFF, spreadsheets)
  • Smart non-translatable detection for brands, variables, and placeholders
  • Domain and tone auto-detection — adapts to medical, legal, gaming, and more
  • Multi-file batch processing with parallel workers
  • Interactive in-browser editing before export

Metrics

Coming soon

Measure translation quality using industry-standard and state-of-the-art LLM-based metrics.

Compare translations against references and calculate scores like COMET, xCOMET, BLEU, chrF++, and MetricX to choose the best-performing engine or human linguist with confidence.

Key features

  • Standard metrics (Free): BLEU, chrF++, nTER, WER, hLEPOR
  • LLM-based metrics (Paid): BERTScore, COMET, xCOMET, MetricX (Base to XXL)
  • Reference-based & Reference-free (QE) modes (e.g. CometKiwi)
  • Weighted Quality Index (WQI) for unified scoring
  • CSV Upload for automated workflows
  • Comprehensive PDF & CSV reports
  • API for Agentic evals & automations Agentic

QACAT

Free trial

Localization QA platform: rule-based checks, AI review and professional linguists in one place.

Catch translation issues before release. Run it from the UI, from your CI, or from an AI agent. How QACAT works

Key features

  • Deterministic checks: placeholders, tags, numbers, terminology and TM mismatches
  • AI QA with a choice of evaluators, as triage for humans
  • LQA by certified linguists with a scored report and corrected translation
  • In-context testing: linguists review strings in your real UI from screenshots
  • Crowdin and Smartcat connectors, Trados files
  • REST API and MCP server Agentic