mozilla/translations

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The code, training pipeline, and models that power Firefox Translations

Stars: 351
Forks: 61
Open beginner issues: 0
Indexed issues: 284
Avg merge: 2d 3h
Merged PRs (30d): 4

Dominant language: C++
License: MPL-2.0
Last GitHub push: Sep 18, 2026
Latest indexed: Sep 19, 2026
Contributing guide: No contributing guide
Code of conduct: Code of conduct
Beginner labels: good first issue help wanted

Beginner friendly Everything

Open All

284 open issues indexed

During Translation Chinese addresses from Japanese to English (or other languages, a country name Japan is appended to the address transaltion Open

Difficulty 4/5 3-5 days Newbie friendliness 42/100

mozilla/translations#1471 · Opened Sep 18, 2026
Inference engine crashes in TranslationModel::loadBackend with more than one worker thread Open

Difficulty 4/5 3-5 days Newbie friendliness 72/100

mozilla/translations#1470 · Opened Sep 17, 2026
Evaluate Hy-MT2 Open

LLM

mozilla/translations#1467 · 3 reactions · 1 assignee · Opened Sep 11, 2026
Buggy translation of time values from Ukrainian Open

quality

Difficulty 4/5 3-5 days Newbie friendliness 45/100

mozilla/translations#1466 · Opened Sep 11, 2026
After Update new version page is not correct language Open

Difficulty 3/5 1-2 days Newbie friendliness 45/100

mozilla/translations#1465 · Opened Sep 11, 2026
Include tacher's back-translation data in distillation Open

experiment

mozilla/translations#1463 · 1 comment · 1 assignee · Opened Sep 10, 2026
Teacher-student gap difference by direction Open

quality

mozilla/translations#1462 · 1 assignee · Opened Sep 10, 2026
German to English error: Backpfeifengesicht translates to "Baking pipe face" Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

mozilla/translations#1457 · Opened Aug 21, 2026
Hindi-to-English translation sometimes uses the word squirrel where it doesn't appear to exist Open

feedback

Difficulty 4/5 3-5 days Newbie friendliness 35/100

mozilla/translations#1453 · Opened Aug 12, 2026
[DE] Severe translation error: "I strongly disagree" translated as "Ich stimme ... stark zu" (Opposite meaning) Open

feedback

Difficulty 4/5 3-5 days Newbie friendliness 48/100

mozilla/translations#1452 · 3 comments · Opened Aug 10, 2026
en_zh-Hans model translates this phrase into a deorgatory term Open

feedback quality

Difficulty 4/5 3-5 days Newbie friendliness 35/100

mozilla/translations#1451 · Opened Aug 7, 2026
Translating a bugzilla bug from russian to english converted drop-down icons to smiley faces Open

feedback

Difficulty 4/5 3-5 days Newbie friendliness 42/100

mozilla/translations#1450 · 1 comment · Opened Aug 7, 2026
Explore pre-trained models for Indic languages Open

language-coverage quality

mozilla/translations#1446 · 7 comments · 1 assignee · Opened Jul 15, 2026
Explore historical changes in Google Translate quality Open

evals

Difficulty 4/5 3-5 days Newbie friendliness 45/100

mozilla/translations#1443 · Opened Jul 8, 2026
Extension links to broken examples Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

mozilla/translations#1441 · 1 comment · Opened Jul 5, 2026
Uyghur language support Open

language-coverage

Difficulty 5/5 Over a week Newbie friendliness 30/100

mozilla/translations#1440 · 11 comments · 1 reaction · Opened Jun 26, 2026
Attention misalignment Open

feedback

Difficulty 4/5 3-5 days Newbie friendliness 35/100

mozilla/translations#1439 · 6 comments · Opened Jun 26, 2026
Add kabyle translation support for Firefox Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

mozilla/translations#1438 · 2 reactions · Opened Jun 26, 2026
Can you make MoE models? Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

mozilla/translations#1435 · 6 comments · Opened Jun 14, 2026
Final evals inference for WMT24pp seems broken Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 42/100

mozilla/translations#1433 · Opened Jun 12, 2026
Urdu language Open

language-coverage

Difficulty 5/5 Over a week Newbie friendliness 30/100

mozilla/translations#1432 · 1 comment · Opened Jun 5, 2026
Use FineTranslations dataset as training data Open

data sources experiment

mozilla/translations#1428 · 1 comment · 1 assignee · Opened May 27, 2026
Dutch to French translation drops a digit in Belgian VAT number (BTW-nr) Open

feedback quality

Difficulty 4/5 3-5 days Newbie friendliness 48/100

mozilla/translations#1427 · 1 comment · Opened May 26, 2026
Consider sourcing well-known corpora from HF in config generator Open

data sources

mozilla/translations#1426 · 1 comment · 1 reaction · 1 assignee · Opened May 19, 2026
Translating from Chinese as a source language sometimes modifies URLs. Open

feedback quality

Difficulty 3/5 1-2 days Newbie friendliness 65/100

mozilla/translations#1424 · Opened May 14, 2026
[ADDITION] Add Urdu and Pashto Languages support Open

language-coverage

Difficulty 4/5 3-5 days Newbie friendliness 38/100

mozilla/translations#1421 · 7 comments · Opened May 3, 2026
Empty decoder_Wemb_QuantMultA on two-vocab language pairs Open

bug

Difficulty 3/5 1-2 days Newbie friendliness 48/100

mozilla/translations#1420 · 2 comments · Opened May 2, 2026
Japanese->English translation of this page was way worse than Chrome's Open

feedback quality

Difficulty 4/5 3-5 days Newbie friendliness 35/100

mozilla/translations#1419 · Opened Apr 27, 2026
Improper translation settings can lead to profanity replacing expected text Open

feedback quality

Difficulty 4/5 3-5 days Newbie friendliness 45/100

mozilla/translations#1418 · Opened Apr 27, 2026
Repeating words in `en_de` short-sentence translations Open

feedback quality

Difficulty 4/5 3-5 days Newbie friendliness 45/100

mozilla/translations#1417 · Opened Apr 24, 2026
Pre-trained weights trainings Open

experiment

mozilla/translations#1416 · 1 assignee · Opened Apr 22, 2026
Translation randomly gets stuck on "Translating..." Open

feedback

Difficulty 4/5 3-5 days Newbie friendliness 48/100

mozilla/translations#1415 · 1 comment · Opened Apr 5, 2026
Croatian-to-English translation sometimes adds the word "clutter" Open

feedback

Difficulty 5/5 Over a week Newbie friendliness 35/100

mozilla/translations#1407 · 2 comments · Opened Mar 28, 2026
`en_zh-Hans` Translates Portions of URLs Open

feedback

Difficulty 4/5 3-5 days Newbie friendliness 48/100

mozilla/translations#1400 · 3 comments · Opened Mar 25, 2026
Parts of text left untranslated in Google search results (en-ru) Open

feedback

Difficulty 4/5 3-5 days Newbie friendliness 35/100

mozilla/translations#1397 · Opened Mar 20, 2026
Add Language and Territory Display Names To Short-Sentence Validation Dataset Open

data sources

Difficulty 4/5 3-5 days Newbie friendliness 48/100

mozilla/translations#1391 · 1 comment · Opened Mar 13, 2026
Translation from Danish to English changes numbers to incorrect value Open

feedback

Difficulty 4/5 3-5 days Newbie friendliness 48/100

mozilla/translations#1388 · 1 comment · Opened Mar 9, 2026
Add language codes to dataset importers Open

language-coverage quality

Difficulty 5/5 Over a week Newbie friendliness 30/100

mozilla/translations#1379 · 1 comment · Opened Feb 12, 2026
incorect translation JA-EN Open

feedback

Difficulty 5/5 Over a week Newbie friendliness 25/100

mozilla/translations#1375 · 3 comments · Opened Feb 9, 2026
Finetune high-resource languages on LLM-generated data Open

LLM quality

Difficulty 5/5 Over a week Newbie friendliness 35/100

mozilla/translations#1369 · 6 comments · Opened Feb 4, 2026
Serbo-Croatian improvements plan Open

experiment

mozilla/translations#1367 · 6 comments · 1 assignee · Opened Feb 4, 2026
[meta] Training Next Open

language-coverage meta

Difficulty 5/5 Over a week Newbie friendliness 25/100

mozilla/translations#1361 · 1 comment · 2 reactions · Opened Jan 27, 2026
ASCII commas instead of full-width ones for Chinese Open

bug quality

Difficulty 5/5 Over a week Newbie friendliness 25/100

mozilla/translations#1360 · 7 comments · Opened Jan 26, 2026
No option for proper English Open

feedback

Difficulty 4/5 3-5 days Newbie friendliness 30/100

mozilla/translations#1352 · 3 comments · Opened Jan 14, 2026
Hyperparameters for finetuning on LLM-generated data Open

LLM

Difficulty 5/5 Over a week Newbie friendliness 25/100

mozilla/translations#1346 · 3 comments · Opened Jan 8, 2026
Do not reread all evaluation files on every DB update Open

cost & perf evals

Difficulty 4/5 3-5 days Newbie friendliness 42/100

mozilla/translations#1345 · Opened Jan 8, 2026
Add one final evaluation score Open

evals

Difficulty 5/5 Over a week Newbie friendliness 25/100

mozilla/translations#1339 · 1 comment · Opened Jan 7, 2026
Move translation service to this repo Open

Difficulty 5/5 Over a week Newbie friendliness 20/100

mozilla/translations#1338 · Opened Jan 7, 2026
Names, written in IPA, are occasionally translated into "?"s Open

feedback

Difficulty 4/5 3-5 days Newbie friendliness 30/100

mozilla/translations#1332 · 1 comment · 1 reaction · Opened Dec 29, 2025
Use released model for non-English centric evals Open

bug evals good first issue

Difficulty 3/5 1-2 days Newbie friendliness 55/100

mozilla/translations#1330 · 2 comments · Opened Dec 23, 2025

mozilla/translations

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