Jan M.

Overview I help SaaS, technology, localization, and AI teams ship accurate, natural Czech content – and evaluate the quality of human, machine-translated, and LLM-generated language. Native Czech linguist | 10+ years of experience | 20,000+ Upwork hours | 350+ contracts | 99% Job Success | Top Rated My work goes beyond word-for-word translation. I specialize in localization, linguistic quality assurance, AI/MT output evaluation, and final human review for projects where accuracy, consistency, context, and compliance with detailed guidelines matter. Core services • English → Czech localization – apps, SaaS products, websites, UI, help centers, marketing and product content • LQA & MQM evaluation – error identification, categorization, severity assessment and linguistic QA • AI / LLM language evaluation – Czech output review, preference ranking, linguistic assessment and quality analysis • MTPE – professional post-editing of machine- and AI-generated translations • Proofreading & final review – accuracy, grammar, fluency, terminology, style and consistency • Terminology & style-guide compliance – termbases, client-specific language rules and consistency audits • Legal, financial & technical translation/review – high-accuracy content requiring careful human verification • Audiovisual localization & QC – subtitles, scripts and language quality review What I bring to your project ✓ Native-level Czech language judgment and strong English proficiency ✓ Extensive experience with long-term localization workflows ✓ Careful distinction between objective errors and stylistic preferences ✓ Strict compliance with terminology, character limits, tags, variables and formatting requirements ✓ Experience evaluating both human and AI-generated language ✓ Reliable communication, thorough QA and consistent delivery ✓ Ability to work independently as a Czech language owner or as part of a localization team Tools & formats CAT / localization: SDL Trados Studio, memoQ, Phrase, Smartcat, Crowdin, XTM Cloud, Wordbee, Xbench Formats & technical content: XLIFF, XML, JSON, HTML, spreadsheets, structured localization files, placeholders and variables I am particularly interested in ongoing Czech localization, LQA/MQM, AI language evaluation, linguistic data quality, terminology management and Czech language ownership. If you need more than a translator – someone who can translate, evaluate, review, standardize and take responsibility for Czech language quality – I would be happy to discuss your project.