i18n(pt): complete and ship Brazilian Portuguese

- Translate the remaining 1,868 strings (pt-BR, as in #909) and review the
  contributor entries: HUD codes BRG/SPD/RANGE stay as in the other
  languages, sentence-case layer and scene names, Space key named as on the
  keyboard, short PREV/NEXT/ON/OFF chips, and the CLDR many form (exact
  millions take «de») on every plural.
- Register pt: any pt tag (pt-BR, pt-PT) maps to it; the picker shows
  «Português (Brasil)».
- Codes, units and product names identical to English go to
  same-as-english.json.
- docs/translations/pt.md: style, plurals, units and glossary.

Co-Authored-By: Claude Opus 5.5 <[email protected]>

docs/CURRENT-STATE.md

@@ -3733,7 +3733,7 @@ test:track` 43 tracking invariants · headless QA harnesses under
 
 ### Interface localization (October 2026)
 
-Shipped locales: **en** (source and fallback), **es**, **ru**, **zh-CN** and **zh-Hant**. The code lives in
+Shipped locales: **en** (source and fallback), **es**, **pt** (Brazilian Portuguese), **ru**, **zh-CN** and **zh-Hant**. The code lives in
 `src/i18n/`. How to mark UI text: [`docs/I18N.md`](./I18N.md); translator workflow:
 [`docs/TRANSLATORS.md`](./TRANSLATORS.md).
 
@@ -3744,7 +3744,7 @@ Shipped locales: **en** (source and fallback), **es**, **ru**, **zh-CN** and **z
   value). English has no catalog; every other locale is
   `src/i18n/locales/<code>.json`, and a missing entry falls back to English.
 - **Locale choice.** `?lang=` → stored choice (`gev:locale:v1`) →
-  `navigator.languages` → English. Chinese tags default to `zh-CN`; Traditional Chinese tags
+  `navigator.languages` → English. Any `pt` tag (`pt-BR`, `pt-PT`) selects `pt`. Chinese tags default to `zh-CN`; Traditional Chinese tags
   select `zh-Hant`. Explicit `Hans` selects `zh-CN` regardless of region. `?lang=` is not stored, and share links drop
   it, so a recipient keeps their own language. The globe picker in the
   bottom-right corner (`src/ui/localePicker.js`) stores the choice, drops

docs/TRANSLATORS.md

@@ -1,6 +1,6 @@
 # Translating God's Eye View
 
-Shipped languages: **English** (source and fallback), **Spanish** (`es`), **Russian** (`ru`), **Simplified Chinese** (`zh-CN`) and **Traditional Chinese** (`zh-Hant`).
+Shipped languages: **English** (source and fallback), **Spanish** (`es`), **Brazilian Portuguese** (`pt`), **Russian** (`ru`), **Simplified Chinese** (`zh-CN`) and **Traditional Chinese** (`zh-Hant`).
 
 ## How it works
 
@@ -63,4 +63,4 @@ These are contracts, not copy: layer ids and registry keys, status enums and oth
 
 ## Language notes
 
-Each language keeps its glossary, plural forms, units and style in its own file, `docs/translations/<code>.md`: [Spanish](./translations/es.md), [Russian](./translations/ru.md), [Simplified Chinese](./translations/zh-CN.md), [Traditional Chinese](./translations/zh-Hant.md). Read it before translating, and add a term there when you settle on one.
+Each language keeps its glossary, plural forms, units and style in its own file, `docs/translations/<code>.md`: [Spanish](./translations/es.md), [Brazilian Portuguese](./translations/pt.md), [Russian](./translations/ru.md), [Simplified Chinese](./translations/zh-CN.md), [Traditional Chinese](./translations/zh-Hant.md). Read it before translating, and add a term there when you settle on one.

docs/translations/pt.md

@@ -0,0 +1,81 @@
+# Brazilian Portuguese (`pt`)
+
+Catalog: `src/i18n/locales/pt.json`. General rules: [TRANSLATORS.md](../TRANSLATORS.md).
+
+Translation source: abiyeenzo (#909).
+
+## Style
+
+- Brazilian Portuguese (pt-BR): câmera, tela, compartilhar, arquivo, baixar, ônibus, metrô. Every `pt` tag, `pt-PT` included, gets this catalog, so avoid slang and regionalisms.
+- Address the user with «você» imperatives: «Clique no mapa», «Ative o CCTV», «Tente novamente». Tooltips that name an action use the infinitive: «Expandir painel», «Redefinir a câmera».
+- Sentence case, not Title Case: "Live Flights" → «Voos ao vivo». UPPERCASE English stays UPPERCASE: «AO VIVO», «SEM DADOS».
+- Quotes inside Portuguese text are straight double quotes: «Excluir o plano "{shot}"?».
+- Short labels, chips and HUD readouts stay short. A standard abbreviation with a period beats a wrapped line: ANT., PRÓX., DESLIG., EXCL., INCL., ALT., VEL., câm.
+- The HUD codes HDG, BRG, CRS, FOV, DEST, SPD, RANGE, ALT, GS and TRK stay in English, as in cockpit avionics. Words used in a sentence are translated: heading → «rumo», range → «alcance».
+- Keyboard keys stay in English: Space, Esc, Enter, Tab, Shift, Backspace, H, 1–9 («Segure Space para falar»).
+- Common English tech words used in Brazil stay: feed, stream, snapshot, briefing, dock, layout, bloom, status, app, link, token.
+- Units: km, m, km/h, m/s, kt (knots), ft (feet), h, min, s; in UPPERCASE text KM, KM/S, KT, FT, MIN, H. "m" is always metres, so minutes are «min» («há 5 min»). MW stays MW. `°` and `%` stay. Decimal comma in written numbers («M4,4»).
+- "ago" goes before the time: «há {count} min». When a placeholder already holds a localized "ago" text (`{age}`, `{ago}`), do not add «há» again.
+- Money: «US$ {amount} mil / mi / bi» for thousands, millions and billions.
+- Compass points use Leste/Oeste: N, NNE, NE, ENE, L, ESE, SE, SSE, S, SSO, SO, OSO, O, ONO, NO, NNO; hemisphere letters N, S, L, O.
+
+## Plurals
+
+A `tn()` entry needs three forms. `Intl.PluralRules('pt')` follows Brazilian usage:
+
+| Form    | Counts                                 | Example            |
+| ------- | -------------------------------------- | ------------------ |
+| `one`   | 0, 1 and anything below 2: 0, 1, 1.5   | 0 câmera, 1 câmera |
+| `many`  | 1 000 000, 2 000 000… (exact millions) | 1000000 de câmeras |
+| `other` | everything else: 2–999 999, 2.5…       | 3 câmeras          |
+
+The `many` form is the `other` text with «de» after the number: «{count} de câmeras carregadas», «{count} DE CHAVES PENDENTES». A `one` form is also read for 0, so keep it natural with zero («0 arquivo selecionado» is standard Brazilian usage).
+
+## Glossary
+
+| English                                       | Português                                                    |
+| --------------------------------------------- | ------------------------------------------------------------ |
+| layer / data layer                            | camada / camada de dados                                     |
+| feed / source / data source                   | feed / fonte / fonte de dados                                |
+| LIVE (status) / live data                     | AO VIVO / dados ao vivo                                      |
+| SIMULATED                                     | SIMULADO                                                     |
+| stale / degraded / unavailable                | desatualizado / degradado / indisponível                     |
+| retry / retrying                              | nova tentativa / tentando de novo                            |
+| key (API key) / POWER UP / POWERED UP         | chave / ATIVAR / ATIVADO                                     |
+| Provider Settings                             | Configurações de provedores                                  |
+| ON / OFF (state chips)                        | ATIVO / INATIVO                                              |
+| enable / disable                              | ativar / desativar                                           |
+| globe / map / map source / map stack          | globo / mapa / fonte do mapa / pilha de mapas                |
+| basemap / tile                                | mapa base / bloco                                            |
+| aircraft, plane / flight / military flights   | aeronave, avião / voo / voos militares                       |
+| vessel, ship                                  | embarcação                                                   |
+| satellite / shell (Starlink) / DENSE          | satélite / camada orbital / DENSO                            |
+| launch (rocket) / launch site / space mission | lançamento / local de lançamento / missão espacial           |
+| ascent / replay / payload / stage             | subida / reprise / carga útil / estágio                      |
+| contact / tracking / track                    | contato / rastreamento / rastro                              |
+| installation / site                           | instalação / local                                           |
+| mapped / observed                             | mapeado / observado                                          |
+| camera / CCTV camera                          | câmera / câmera de CCTV                                      |
+| earthquake / active fire                      | terremoto / incêndio ativo                                   |
+| advisory (NHC/CPHC cyclone)                   | boletim                                                      |
+| radio station / broadcaster                   | estação de rádio / emissora                                  |
+| road / flow (traffic)                         | via / fluxo                                                  |
+| Street Level (layer)                          | Nível da rua                                                 |
+| scene / shot / scene recipe                   | cena / plano / receita de cena                               |
+| briefing / panel / dock                       | briefing / painel / dock                                     |
+| cockpit                                       | cabine                                                       |
+| preset / visual preset                        | predefinição / predefinição visual                           |
+| Scope (circular viewport mask) / keyhole      | mira / visor                                                 |
+| feather / fade                                | suavização / esmaecimento                                    |
+| detection overlay                             | sobreposição de detecção                                     |
+| pin (Draw tool) / box (Recent Imagery)        | marcador / área                                              |
+| Cyber (HUD layout, effect)                    | Ciber                                                        |
+| heading / course / altitude / ground speed    | rumo / curso / altitude / velocidade solo (VELOC. SOLO)      |
+| HDG / BRG / CRS / FOV / DEST / SPD / RANGE    | HDG / BRG / CRS / FOV / DEST / SPD / RANGE (unchanged)       |
+| PREV / NEXT                                   | ANT. / PRÓX.                                                 |
+| Previous / Next (button text)                 | Anterior / Próximo (Próxima)                                 |
+| L / R (relative bearing)                      | E / D                                                        |
+| SIG / NEWS / LOCAL (briefing tabs)            | SIG / NOTÍCIAS / LOCAL                                       |
+| PITCH / HGT (CCTV calibration chips)          | INCL. / ALT.                                                 |
+| NOT AN ALL-CLEAR                              | NÃO GARANTE SEGURANÇA                                        |
+| turn-by-turn: turn left / keep left / lane    | vire à esquerda / mantenha-se à esquerda / faixa da esquerda |

scripts/package-boundaries.json

@@ -440,6 +440,7 @@
       "src/i18n/index.js",
       "src/i18n/locale.js",
       "src/i18n/locales/es.json",
+      "src/i18n/locales/pt.json",
       "src/i18n/locales/ru.json",
       "src/i18n/locales/zh-CN.json",
       "src/i18n/locales/zh-Hant.json"
@@ -480,6 +481,7 @@
       "src/i18n/index.js",
       "src/i18n/locale.js",
       "src/i18n/locales/es.json",
+      "src/i18n/locales/pt.json",
       "src/i18n/locales/ru.json",
       "src/i18n/locales/zh-CN.json",
       "src/i18n/locales/zh-Hant.json"
@@ -510,6 +512,7 @@
       "src/i18n/index.js",
       "src/i18n/locale.js",
       "src/i18n/locales/es.json",
+      "src/i18n/locales/pt.json",
       "src/i18n/locales/ru.json",
       "src/i18n/locales/zh-CN.json",
       "src/i18n/locales/zh-Hant.json",
@@ -532,6 +535,7 @@
       "src/i18n/index.js",
       "src/i18n/locale.js",
       "src/i18n/locales/es.json",
+      "src/i18n/locales/pt.json",
       "src/i18n/locales/ru.json",
       "src/i18n/locales/zh-CN.json",
       "src/i18n/locales/zh-Hant.json"
@@ -549,6 +553,7 @@
       "src/i18n/index.js",
       "src/i18n/locale.js",
       "src/i18n/locales/es.json",
+      "src/i18n/locales/pt.json",
       "src/i18n/locales/ru.json",
       "src/i18n/locales/zh-CN.json",
       "src/i18n/locales/zh-Hant.json"
@@ -569,6 +574,7 @@
       "src/i18n/index.js",
       "src/i18n/locale.js",
       "src/i18n/locales/es.json",
+      "src/i18n/locales/pt.json",
       "src/i18n/locales/ru.json",
       "src/i18n/locales/zh-CN.json",
       "src/i18n/locales/zh-Hant.json",
@@ -596,6 +602,7 @@
       "src/i18n/index.js",
       "src/i18n/locale.js",
       "src/i18n/locales/es.json",
+      "src/i18n/locales/pt.json",
       "src/i18n/locales/ru.json",
       "src/i18n/locales/zh-CN.json",
       "src/i18n/locales/zh-Hant.json",
@@ -631,6 +638,7 @@
       "src/i18n/index.js",
       "src/i18n/locale.js",
       "src/i18n/locales/es.json",
+      "src/i18n/locales/pt.json",
       "src/i18n/locales/ru.json",
       "src/i18n/locales/zh-CN.json",
       "src/i18n/locales/zh-Hant.json",
@@ -648,6 +656,7 @@
       "src/i18n/index.js",
       "src/i18n/locale.js",
       "src/i18n/locales/es.json",
+      "src/i18n/locales/pt.json",
       "src/i18n/locales/ru.json",
       "src/i18n/locales/zh-CN.json",
       "src/i18n/locales/zh-Hant.json",
@@ -807,6 +816,7 @@
       "src/i18n/index.js",
       "src/i18n/locale.js",
       "src/i18n/locales/es.json",
+      "src/i18n/locales/pt.json",
       "src/i18n/locales/ru.json",
       "src/i18n/locales/zh-CN.json",
       "src/i18n/locales/zh-Hant.json",
@@ -929,6 +939,7 @@
       "src/i18n/index.js",
       "src/i18n/locale.js",
       "src/i18n/locales/es.json",
+      "src/i18n/locales/pt.json",
       "src/i18n/locales/ru.json",
       "src/i18n/locales/zh-CN.json",
       "src/i18n/locales/zh-Hant.json",
@@ -997,6 +1008,7 @@
       "src/i18n/index.js",
       "src/i18n/locale.js",
       "src/i18n/locales/es.json",
+      "src/i18n/locales/pt.json",
       "src/i18n/locales/ru.json",
       "src/i18n/locales/zh-CN.json",
       "src/i18n/locales/zh-Hant.json",
@@ -1046,6 +1058,7 @@
       "src/i18n/index.js",
       "src/i18n/locale.js",
       "src/i18n/locales/es.json",
+      "src/i18n/locales/pt.json",
       "src/i18n/locales/ru.json",
       "src/i18n/locales/zh-CN.json",
       "src/i18n/locales/zh-Hant.json"
@@ -1109,6 +1122,7 @@
       "src/i18n/index.js",
       "src/i18n/locale.js",
       "src/i18n/locales/es.json",
+      "src/i18n/locales/pt.json",
       "src/i18n/locales/ru.json",
       "src/i18n/locales/zh-CN.json",
       "src/i18n/locales/zh-Hant.json"
@@ -1139,6 +1153,7 @@
       "src/i18n/index.js",
       "src/i18n/locale.js",
       "src/i18n/locales/es.json",
+      "src/i18n/locales/pt.json",
       "src/i18n/locales/ru.json",
       "src/i18n/locales/zh-CN.json",
       "src/i18n/locales/zh-Hant.json",
@@ -1170,6 +1185,7 @@
       "src/i18n/index.js",
       "src/i18n/locale.js",
       "src/i18n/locales/es.json",
+      "src/i18n/locales/pt.json",
       "src/i18n/locales/ru.json",
       "src/i18n/locales/zh-CN.json",
       "src/i18n/locales/zh-Hant.json"
@@ -1201,6 +1217,7 @@
       "src/i18n/index.js",
       "src/i18n/locale.js",
       "src/i18n/locales/es.json",
+      "src/i18n/locales/pt.json",
       "src/i18n/locales/ru.json",
       "src/i18n/locales/zh-CN.json",
       "src/i18n/locales/zh-Hant.json",
@@ -1235,6 +1252,7 @@
       "src/i18n/index.js",
       "src/i18n/locale.js",
       "src/i18n/locales/es.json",
+      "src/i18n/locales/pt.json",
       "src/i18n/locales/ru.json",
       "src/i18n/locales/zh-CN.json",
       "src/i18n/locales/zh-Hant.json"
@@ -1278,6 +1296,7 @@
       "src/i18n/index.js",
       "src/i18n/locale.js",
       "src/i18n/locales/es.json",
+      "src/i18n/locales/pt.json",
       "src/i18n/locales/ru.json",
       "src/i18n/locales/zh-CN.json",
       "src/i18n/locales/zh-Hant.json",
@@ -1315,6 +1334,7 @@
       "src/i18n/index.js",
       "src/i18n/locale.js",
       "src/i18n/locales/es.json",
+      "src/i18n/locales/pt.json",
       "src/i18n/locales/ru.json",
       "src/i18n/locales/zh-CN.json",
       "src/i18n/locales/zh-Hant.json",
@@ -1366,6 +1386,7 @@
       "src/i18n/index.js",
       "src/i18n/locale.js",
       "src/i18n/locales/es.json",
+      "src/i18n/locales/pt.json",
       "src/i18n/locales/ru.json",
       "src/i18n/locales/zh-CN.json",
       "src/i18n/locales/zh-Hant.json"
@@ -1396,6 +1417,7 @@
       "src/i18n/index.js",
       "src/i18n/locale.js",
       "src/i18n/locales/es.json",
+      "src/i18n/locales/pt.json",
       "src/i18n/locales/ru.json",
       "src/i18n/locales/zh-CN.json",
       "src/i18n/locales/zh-Hant.json"
@@ -1445,6 +1467,7 @@
       "src/i18n/index.js",
       "src/i18n/locale.js",
       "src/i18n/locales/es.json",
+      "src/i18n/locales/pt.json",
       "src/i18n/locales/ru.json",
       "src/i18n/locales/zh-CN.json",
       "src/i18n/locales/zh-Hant.json"
@@ -1509,6 +1532,7 @@
       "src/i18n/index.js",
       "src/i18n/locale.js",
       "src/i18n/locales/es.json",
+      "src/i18n/locales/pt.json",
       "src/i18n/locales/ru.json",
       "src/i18n/locales/zh-CN.json",
       "src/i18n/locales/zh-Hant.json",
@@ -1539,6 +1563,7 @@
       "src/i18n/index.js",
       "src/i18n/locale.js",
       "src/i18n/locales/es.json",
+      "src/i18n/locales/pt.json",
       "src/i18n/locales/ru.json",
       "src/i18n/locales/zh-CN.json",
       "src/i18n/locales/zh-Hant.json"
@@ -1580,6 +1605,7 @@
       "src/i18n/index.js",
       "src/i18n/locale.js",
       "src/i18n/locales/es.json",
+      "src/i18n/locales/pt.json",
       "src/i18n/locales/ru.json",
       "src/i18n/locales/zh-CN.json",
       "src/i18n/locales/zh-Hant.json"
@@ -1603,6 +1629,7 @@
       "src/i18n/index.js",
       "src/i18n/locale.js",
       "src/i18n/locales/es.json",
+      "src/i18n/locales/pt.json",
       "src/i18n/locales/ru.json",
       "src/i18n/locales/zh-CN.json",
       "src/i18n/locales/zh-Hant.json"
@@ -1660,6 +1687,7 @@
       "src/i18n/index.js",
       "src/i18n/locale.js",
       "src/i18n/locales/es.json",
+      "src/i18n/locales/pt.json",
       "src/i18n/locales/ru.json",
       "src/i18n/locales/zh-CN.json",
       "src/i18n/locales/zh-Hant.json"
@@ -1723,6 +1751,7 @@
       "src/i18n/index.js",
       "src/i18n/locale.js",
       "src/i18n/locales/es.json",
+      "src/i18n/locales/pt.json",
       "src/i18n/locales/ru.json",
       "src/i18n/locales/zh-CN.json",
       "src/i18n/locales/zh-Hant.json",
@@ -2606,6 +2635,7 @@
       "src/i18n/index.js",
       "src/i18n/locale.js",
       "src/i18n/locales/es.json",
+      "src/i18n/locales/pt.json",
       "src/i18n/locales/ru.json",
       "src/i18n/locales/zh-CN.json",
       "src/i18n/locales/zh-Hant.json",
@@ -3191,6 +3221,7 @@
       "src/i18n/index.js",
       "src/i18n/locale.js",
       "src/i18n/locales/es.json",
+      "src/i18n/locales/pt.json",
       "src/i18n/locales/ru.json",
       "src/i18n/locales/zh-CN.json",
       "src/i18n/locales/zh-Hant.json",
@@ -3302,6 +3333,7 @@
       "src/data/cameraArrival.js",
       "src/i18n/locale.js",
       "src/i18n/locales/es.json",
+      "src/i18n/locales/pt.json",
       "src/i18n/locales/ru.json",
       "src/i18n/locales/zh-CN.json",
       "src/i18n/locales/zh-Hant.json",
@@ -3326,6 +3358,7 @@
       "src/i18n/index.js",
       "src/i18n/locale.js",
       "src/i18n/locales/es.json",
+      "src/i18n/locales/pt.json",
       "src/i18n/locales/ru.json",
       "src/i18n/locales/zh-CN.json",
       "src/i18n/locales/zh-Hant.json"
@@ -3363,6 +3396,7 @@
       "src/i18n/index.js",
       "src/i18n/locale.js",
       "src/i18n/locales/es.json",
+      "src/i18n/locales/pt.json",
       "src/i18n/locales/ru.json",
       "src/i18n/locales/zh-CN.json",
       "src/i18n/locales/zh-Hant.json",
@@ -3390,6 +3424,7 @@
       "src/i18n/index.js",
       "src/i18n/locale.js",
       "src/i18n/locales/es.json",
+      "src/i18n/locales/pt.json",
       "src/i18n/locales/ru.json",
       "src/i18n/locales/zh-CN.json",
       "src/i18n/locales/zh-Hant.json"
@@ -3482,6 +3517,7 @@
       "src/i18n/index.js",
       "src/i18n/locale.js",
       "src/i18n/locales/es.json",
+      "src/i18n/locales/pt.json",
       "src/i18n/locales/ru.json",
       "src/i18n/locales/zh-CN.json",
       "src/i18n/locales/zh-Hant.json",
@@ -3538,6 +3574,7 @@
       "src/i18n/index.js",
       "src/i18n/locale.js",
       "src/i18n/locales/es.json",
+      "src/i18n/locales/pt.json",
       "src/i18n/locales/ru.json",
       "src/i18n/locales/zh-CN.json",
       "src/i18n/locales/zh-Hant.json",
@@ -3793,6 +3830,7 @@
       "src/i18n/index.js",
       "src/i18n/locale.js",
       "src/i18n/locales/es.json",
+      "src/i18n/locales/pt.json",
       "src/i18n/locales/ru.json",
       "src/i18n/locales/zh-CN.json",
       "src/i18n/locales/zh-Hant.json"
@@ -3837,6 +3875,7 @@
       "src/i18n/index.js",
       "src/i18n/locale.js",
       "src/i18n/locales/es.json",
+      "src/i18n/locales/pt.json",
       "src/i18n/locales/ru.json",
       "src/i18n/locales/zh-CN.json",
       "src/i18n/locales/zh-Hant.json"
@@ -3891,6 +3930,7 @@
       "src/i18n/index.js",
       "src/i18n/locale.js",
       "src/i18n/locales/es.json",
+      "src/i18n/locales/pt.json",
       "src/i18n/locales/ru.json",
       "src/i18n/locales/zh-CN.json",
       "src/i18n/locales/zh-Hant.json"
@@ -3908,6 +3948,7 @@
       "src/i18n/index.js",
       "src/i18n/locale.js",
       "src/i18n/locales/es.json",
+      "src/i18n/locales/pt.json",
       "src/i18n/locales/ru.json",
       "src/i18n/locales/zh-CN.json",
       "src/i18n/locales/zh-Hant.json",
@@ -3968,6 +4009,7 @@
       "src/i18n/index.js",
       "src/i18n/locale.js",
       "src/i18n/locales/es.json",
+      "src/i18n/locales/pt.json",
       "src/i18n/locales/ru.json",
       "src/i18n/locales/zh-CN.json",
       "src/i18n/locales/zh-Hant.json",
@@ -4165,6 +4207,7 @@
       "src/i18n/index.js",
       "src/i18n/locale.js",
       "src/i18n/locales/es.json",
+      "src/i18n/locales/pt.json",
       "src/i18n/locales/ru.json",
       "src/i18n/locales/zh-CN.json",
       "src/i18n/locales/zh-Hant.json",

src/i18n/i18n.test.mjs

@@ -34,6 +34,8 @@ test('normalizeLocale folds regional variants and rejects unshipped tags', () =>
   assert.equal(normalizeLocale('ru-RU'), 'ru');
   assert.equal(normalizeLocale(' RU '), 'ru');
   assert.equal(normalizeLocale('en_GB'), 'en');
+  assert.equal(normalizeLocale('pt-BR'), 'pt');
+  assert.equal(normalizeLocale('pt_PT'), 'pt');
   assert.equal(normalizeLocale('xx'), null);
   // Explicit script tags take precedence over regional defaults.
   assert.equal(normalizeLocale('zh'), 'zh-CN');
@@ -142,6 +144,20 @@ test('tn() picks English and Russian plural forms', () => {
   assert.match(label(21), / 21 КЛЮЧ(?![А-ЯЁ])/);
 });
 
+test('tn() picks the Portuguese one, many and other forms', () => {
+  const label = (count) =>
+    tn(
+      count,
+      'POWER UP · {count} KEY WAITING',
+      'POWER UP · {count} KEYS WAITING',
+    );
+  setLocale('pt');
+  assert.equal(label(0), 'ATIVAR · 0 CHAVE PENDENTE');
+  assert.equal(label(1), 'ATIVAR · 1 CHAVE PENDENTE');
+  assert.equal(label(3), 'ATIVAR · 3 CHAVES PENDENTES');
+  assert.equal(label(1_000_000), 'ATIVAR · 1000000 DE CHAVES PENDENTES');
+});
+
 test('t() context separates identical English with different meanings', () => {
   assert.equal(t('CLEAR', { context: 'action' }), 'CLEAR');
   setLocale('ru');

src/i18n/index.js

@@ -17,11 +17,18 @@ import {
   writeStoredLocale,
 } from './locale.js';
 import es from './locales/es.json' with { type: 'json' };
+import pt from './locales/pt.json' with { type: 'json' };
 import ru from './locales/ru.json' with { type: 'json' };
 import zhCN from './locales/zh-CN.json' with { type: 'json' };
 import zhHant from './locales/zh-Hant.json' with { type: 'json' };
 
-const CATALOGS = Object.freeze({ es, ru, 'zh-CN': zhCN, 'zh-Hant': zhHant });
+const CATALOGS = Object.freeze({
+  es,
+  pt,
+  ru,
+  'zh-CN': zhCN,
+  'zh-Hant': zhHant,
+});
 
 let currentLocale = DEFAULT_LOCALE;
 

src/i18n/locale.js

@@ -8,12 +8,20 @@ export const LOCALE_STORAGE_KEY = 'gev:locale:v1';
 export const DEFAULT_LOCALE = 'en';
 
 /** Shipped locales; order does not matter. Adding one: docs/TRANSLATORS.md. */
-export const LOCALES = Object.freeze(['en', 'es', 'ru', 'zh-CN', 'zh-Hant']);
+export const LOCALES = Object.freeze([
+  'en',
+  'es',
+  'pt',
+  'ru',
+  'zh-CN',
+  'zh-Hant',
+]);
 
 /** Each locale named in its own language, for the selector. */
 export const LOCALE_NAMES = Object.freeze({
   en: 'English',
   es: 'Español',
+  pt: 'Português (Brasil)',
   ru: 'Русский',
   'zh-CN': '中文（简体）',
   'zh-Hant': '中文（繁體）',
@@ -24,6 +32,7 @@ const RTL_LOCALES = Object.freeze([]);
 
 /**
  * Map any language tag to a shipped locale: 'ru-RU' and 'RU' → 'ru',
+ * 'pt-BR' and 'pt-PT' → 'pt' (Brazilian Portuguese),
  * 'zh', 'zh-CN' and 'zh-Hans-SG' → 'zh-CN';
  * 'zh-Hant', 'zh-TW', 'zh-HK' and 'zh-MO' → 'zh-Hant'.
  * @returns {string|null}

src/i18n/same-as-english.json

@@ -124,6 +124,131 @@
     "ΔN",
     "▲ {frp} MW"
   ],
+  "pt": [
+    "1090 MHz",
+    "978 MHz UAT",
+    "AIS: --",
+    "AIS: {name}",
+    "ALTITUDE",
+    "ALTITUDE · FT",
+    "ANIME",
+    "AUTO",
+    "Altitude {altitude}",
+    "Anime",
+    "Austin",
+    "BIKE",
+    "BRG {value}°",
+    "BRG —",
+    "Bloom",
+    "Blues",
+    "CAL {value}",
+    "CAL · {badge}",
+    "CCTV",
+    "CRS {value}°",
+    "CRT",
+    "Country",
+    "DEST ---°",
+    "DEST {bearing}",
+    "Dance",
+    "Drone",
+    "Dubai",
+    "ENE",
+    "ESE",
+    "FLIR",
+    "FLT",
+    "FM MHZ",
+    "FOV",
+    "FOV {value}°",
+    "FT",
+    "Folk",
+    "Funk",
+    "GEO",
+    "GOOGLE STREET VIEW",
+    "Global",
+    "Global · 60°S–60°N",
+    "Google Street View",
+    "HDG",
+    "HDG {value}°",
+    "Hip-Hop",
+    "House",
+    "Indie",
+    "Ironbow",
+    "Jazz",
+    "LOCAL",
+    "Landsat 8/9",
+    "Landsat 8/9 via HLS",
+    "Layout",
+    "Los Angeles",
+    "MIC",
+    "MIL",
+    "MINI",
+    "MM",
+    "MONITOR",
+    "MSG/S",
+    "Metal",
+    "NAV",
+    "NE",
+    "NNE",
+    "NOIR",
+    "NORMAL",
+    "NVG",
+    "Noir",
+    "Normal",
+    "OCEANIA",
+    "OK",
+    "POS: {time}Z",
+    "PRECIP",
+    "Paris",
+    "Pop",
+    "Punk",
+    "RANGE",
+    "Reggae",
+    "Rock",
+    "S2 GhostMaps",
+    "SAR",
+    "SE",
+    "SIG",
+    "SNAPSHOT",
+    "SQUAWK {code} · {status}",
+    "SSE",
+    "STATUS",
+    "STATUS · ",
+    "Sentinel-2",
+    "Sentinel-2 via HLS",
+    "Sonar",
+    "Soul",
+    "TAGS · {tags}",
+    "TEMP",
+    "Tallinn",
+    "Techno",
+    "Trance",
+    "USB {rate} msg/s",
+    "VISUAL",
+    "VOLUME",
+    "VS",
+    "WHOT/BHOT",
+    "WX",
+    "dB",
+    "fire confidence|nominal",
+    "ft",
+    "hPa",
+    "installation class|BASE",
+    "km",
+    "km/h",
+    "kt",
+    "min",
+    "mini",
+    "mph",
+    "nominal",
+    "view band|GLOBAL",
+    "{rate} msg/s",
+    "{type}  SPD: {speed}  HDG: {heading}",
+    "{value} KM",
+    "{value} KM/H",
+    "{value} KM/S",
+    "ΔN",
+    "▲ {frp} MW"
+  ],
   "ru": [
     "AIS: --",
     "AIS: {name}",

src/ui/localePicker.test.mjs

@@ -40,7 +40,7 @@ test('the current language comes first, the rest by their own names', () => {
         nativeNames: LOCALE_NAMES,
       }),
     ),
-    ['ru', 'en', 'es', 'zh-CN', 'zh-Hant'],
+    ['ru', 'en', 'es', 'pt', 'zh-CN', 'zh-Hant'],
   );
   assert.deepEqual(
     codes(
@@ -50,7 +50,7 @@ test('the current language comes first, the rest by their own names', () => {
         nativeNames: LOCALE_NAMES,
       }),
     ),
-    ['es', 'en', 'ru', 'zh-CN', 'zh-Hant'],
+    ['es', 'en', 'pt', 'ru', 'zh-CN', 'zh-Hant'],
   );
   assert.deepEqual(
     codes(
@@ -60,7 +60,7 @@ test('the current language comes first, the rest by their own names', () => {
         nativeNames: LOCALE_NAMES,
       }),
     ),
-    ['en', 'es', 'ru', 'zh-CN', 'zh-Hant'],
+    ['en', 'es', 'pt', 'ru', 'zh-CN', 'zh-Hant'],
   );
   const rows = buildLocaleOptions({
     locales: MANY,