
Marcel Carvalho focused on enhancing Brazilian Portuguese localization across the Mattermost ecosystem, including the mattermost-mobile, mattermost/desktop, and mattermost/mattermost repositories. Over three months, Marcel delivered updated translations using Weblate, improving translation coverage for both server and web applications. He applied internationalization and localization best practices, working with JavaScript, JSON, and XML to ensure accurate and traceable translation updates. Marcel’s work stabilized the localization pipeline, increased translation completeness to over 92% for the server, and improved the user experience for PT-BR users. His contributions reduced language barriers and supported Mattermost’s broader adoption in Brazilian markets through consistent, quality localization.

July 2025 — Mattermost localization work for mattermost/mattermost: Portuguese (Brazil) Localization Coverage Improvement. Delivered updated translations for server and web app via Weblate. Server translations now at 92.4% (2527/2734 strings) and webapp translations at 71.3% (4633/6493 strings). Two translation commits were created to capture the work (translated using Weblate, Portuguese (Brazil)). This work reduces language barriers for PT-BR users and increases potential adoption in Brazilian markets.
July 2025 — Mattermost localization work for mattermost/mattermost: Portuguese (Brazil) Localization Coverage Improvement. Delivered updated translations for server and web app via Weblate. Server translations now at 92.4% (2527/2734 strings) and webapp translations at 71.3% (4633/6493 strings). Two translation commits were created to capture the work (translated using Weblate, Portuguese (Brazil)). This work reduces language barriers for PT-BR users and increases potential adoption in Brazilian markets.
May 2025 localization sprint across Mattermost Desktop and Mattermost Web App. Delivered Brazilian Portuguese translations via Weblate, with Desktop progress toward full string coverage and Web App translations advancing to 72% completion. No major bugs fixed this month; focus remained on stabilizing localization pipelines and preparing for upcoming releases. Demonstrated strong i18n process, cross-repo collaboration, and value delivery for Brazilian users.
May 2025 localization sprint across Mattermost Desktop and Mattermost Web App. Delivered Brazilian Portuguese translations via Weblate, with Desktop progress toward full string coverage and Web App translations advancing to 72% completion. No major bugs fixed this month; focus remained on stabilizing localization pipelines and preparing for upcoming releases. Demonstrated strong i18n process, cross-repo collaboration, and value delivery for Brazilian users.
March 2025 — Mattermost Mobile: Delivered a Brazilian Portuguese localization update via Weblate for the mobile app, reflecting current translation progress with updated percentage and translated string counts. No major bugs fixed this month. Impact: improved PT-BR user experience and readiness for broader adoption by ensuring accurate, up-to-date translations in the app. Demonstrated skills: Weblate-based translation workflow, commit-based traceability, internationalization practices, and mobile app localization.
March 2025 — Mattermost Mobile: Delivered a Brazilian Portuguese localization update via Weblate for the mobile app, reflecting current translation progress with updated percentage and translated string counts. No major bugs fixed this month. Impact: improved PT-BR user experience and readiness for broader adoption by ensuring accurate, up-to-date translations in the app. Demonstrated skills: Weblate-based translation workflow, commit-based traceability, internationalization practices, and mobile app localization.
Overview of all repositories you've contributed to across your timeline