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Selim Şumlu

PROFILE

Selim Şumlu

Selim focused on advancing localization and internationalization across the mozilla/addons-frontend and thunderbird/thunderbird-l10n repositories, delivering Turkish language support and modernizing UI components. He migrated legacy DTD and properties files to Fluent, consolidated translation workflows using Pontoon, and improved accessibility by adding ARIA attributes to Thunderbird’s UI. Selim’s work included refining translation accuracy, standardizing terminology, and updating error messaging, which reduced maintenance overhead and improved user experience for Turkish-speaking users. Leveraging JavaScript and front end development skills, he ensured scalable, maintainable localization infrastructure, enabling dynamic labels and consistent messaging across interfaces while aligning with evolving internationalization strategies.

Overall Statistics

Feature vs Bugs

100%Features

Repository Contributions

36Total
Bugs
0
Commits
36
Features
14
Lines of code
443
Activity Months10

Your Network

385 people

Shared Repositories

385
Lan GladMember
ZiriSutMember
Francesco LodoloMember
wladowMember
Francesco Lodolo [:flod]Member
Valery LedovskoyMember
Google TranslateMember
G12rMember
Translation MemoryMember

Work History

April 2026

1 Commits • 1 Features

Apr 1, 2026

April 2026 monthly summary for thunderbird/thunderbird-l10n. Delivered Archive UI cleanup by removing the XUL tree from the archive options dialog and updated localization strings for inbox and folder names, tied to Bug 2030867 (part 1).

March 2026

5 Commits • 3 Features

Mar 1, 2026

March 2026 (2026-03) monthly summary for thunderbird/thunderbird-l10n. Focused on delivering localization improvements for UI components, enhancing user guidance around large attachments, and boosting accessibility, with an emphasis on business value and maintainability.

February 2026

7 Commits • 1 Features

Feb 1, 2026

February 2026 monthly summary for thunderbird/thunderbird-l10n focused on delivering UI localization enhancements and aligning with Fluent localization strategy. Consolidated localization updates across menus, prompts, filters, attachments, cookies management, and new mail alerts, enabling dynamic labels and consistent UX across locales. Completed Fluent migrations for key UI components and prepared groundwork for scalable localization rollout.

January 2026

1 Commits • 1 Features

Jan 1, 2026

January 2026: Focused on advancing localization infrastructure for Thunderbird by introducing a new account creation strings file to support migration to Fluent localization. Completed Part 1 of migrating accountCreationModel to Fluent, aligning with the long-term localization strategy and reducing translation maintenance costs. This work establishes a foundation for consistent, scalable translations across locales and improves user-facing error messaging during account creation.

November 2025

2 Commits • 1 Features

Nov 1, 2025

November 2025 (2025-11) – Localization-focused delivery for thunderbird/thunderbird-l10n: Turkish language support improvements via multi-author UI string and Fluent migration of error and UI-related properties. This work enhances clarity for Turkish users, improves maintainability, and establishes a scalable path for future translations.

October 2025

3 Commits • 2 Features

Oct 1, 2025

Monthly performance summary for 2025-10 (thunderbird/thunderbird-l10n): Completed Fluent-based localization migrations to standardize junk/spam terminology and modernize calendar creation strings, improving internationalization, consistency, and maintainability across Thunderbird UI. These changes lay groundwork for unified string usage across the messenger UI and reduce localization drift, enabling faster locale updates.

January 2025

1 Commits • 1 Features

Jan 1, 2025

January 2025: Implemented Turkish localization improvements for Thunderbird compose messages in the thunderbird-l10n repository. Cleaned up localization files by removing a commented-out note and refined wording for saving sent messages locally, improving clarity and consistency in the Turkish UI. Delivered via Pontoon localization workflow with a focused, single-repo change.

December 2024

13 Commits • 2 Features

Dec 1, 2024

December 2024 performance summary focusing on Turkish localization efforts across Mozilla.org and Thunderbird. Delivered a comprehensive Turkish localization overhaul for the M24 Mozilla.org site and improved accuracy and relevance in Thunderbird UI. Demonstrated strong cross-repo collaboration, effective use of Pontoon localization tooling, and a commitment to accessibility and business-focused messaging.

November 2024

1 Commits • 1 Features

Nov 1, 2024

November 2024: Delivered Turkish Localization Updates for AMO Frontend. Updated Turkish translations and translator attribution in amo.po to reflect the latest messages, ensuring the AMO frontend presents accurate content for Turkish users. This work aligns the UI with the current Pontoon-based localization workflow and reduces translation drift, laying groundwork for smoother internationalization in upcoming releases.

October 2024

2 Commits • 1 Features

Oct 1, 2024

October 2024 monthly summary focusing on localization efforts for the Mozilla Add-ons Frontend. This month, Turkish localization updates were delivered for the AMO Frontend, tightening translations and ensuring accuracy for user-facing strings related to feedback forms and legal disclaimers. The work involved refining Turkish (tr) translations in Pontoon and updating the amo.po file to fill previously empty fields and correct phrasing. No major bugs were fixed this month; the changes improve user experience for Turkish-speaking users and lay groundwork for broader internationalization.

Activity

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Quality Metrics

Correctness100.0%
Maintainability100.0%
Architecture100.0%
Performance100.0%
AI Usage20.0%

Skills & Technologies

Programming Languages

DTDFTLFluentFreeMarkerJavaScriptPOftlproperties

Technical Skills

InternationalizationJavaScriptLocalizationTranslationUI/UX designWeb Developmentaccessibilityfront end developmentinternationalizationlocalizationsoftware development

Repositories Contributed To

3 repos

Overview of all repositories you've contributed to across your timeline

thunderbird/thunderbird-l10n

Dec 2024 Apr 2026
8 Months active

Languages Used

DTDpropertiesFTLftlJavaScript

Technical Skills

InternationalizationLocalizationfront end developmentinternationalizationlocalizationJavaScript

mozilla-l10n/www-l10n

Dec 2024 Dec 2024
1 Month active

Languages Used

FTLFluentFreeMarkerftl

Technical Skills

InternationalizationLocalizationTranslationWeb Development

mozilla/addons-frontend

Oct 2024 Nov 2024
2 Months active

Languages Used

PO

Technical Skills

Localization