i18n(it): ship Italian

- Register it: catalog in index.js, LOCALES and LOCALE_NAMES (Italiano);
  it-IT, it-CH and other it tags select it.
- List it.json with the other catalogs in package-boundaries.json.
- docs/translations/it.md: style, plurals and glossary; Italian in the
  shipped lists of TRANSLATORS.md and CURRENT-STATE.md.

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**, **it**, **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).
 

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`), **Italian** (`it`), **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), [Italian](./translations/it.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/it.md

@@ -0,0 +1,90 @@
+# Italian (`it`)
+
+Catalog: `src/i18n/locales/it.json`. General rules: [TRANSLATORS.md](../TRANSLATORS.md).
+
+Translation source: abiyeenzo (#912).
+
+## Style
+
+- Standard Italian as in Italian software UIs. Address the user with informal "tu" imperatives: «Aggiungi», «Attiva», «Scegli», «Incolla», «Riprova». Tooltips that name an action use the same imperative: «Espandi il pannello», «Ripristina la camera».
+- Sentence case, not Title Case: "Live Flights" → «Voli live», "Space Missions" → «Missioni spaziali». UPPERCASE English stays UPPERCASE: «LIVE», «NON DISPONIBILE».
+- Quotes inside Italian text are straight double quotes: «Eliminare lo scatto "{shot}"?». Use the accented capitals (È, À) in UPPERCASE text: «VELOCITÀ», «CITTÀ».
+- Errors read as a statement, not a past participle on its own: "Search failed" → «Ricerca non riuscita»; "Could not …" → «Impossibile …». A dash that joins a cause and a hint becomes a colon: «Chiave API rifiutata: controlla AISSTREAM_API_KEY».
+- Short labels, chips and HUD readouts stay short. A standard abbreviation with a period beats a wrapped line: REGOLAZ., RILEV., INCL., ALT., VEL., STIM.; PREC / SUCC for PREV / NEXT.
+- The HUD codes HDG, BRG, CRS, FOV and DEST stay in English, as in cockpit avionics. RANGE is «PORTATA». Words used in a sentence are translated: heading → «prua» (aircraft) or «direzione» (camera), course → «rotta».
+- Keyboard keys stay in English: Space, Enter, Esc, Tab, Shift, Backspace, H, 1–9 («Tieni premuto Space per parlare», «Premi Enter per riprovare»).
+- Decimal comma in numbers written in the text: «28,2710° N». Numbers formatted by the code follow `Intl` and need nothing.
+- Units: km, m, km/h, m/s, kn (knots), ft (feet), h, min, s; in UPPERCASE text KM, KM/S, KT, FT, MIN, H. "m" is always metres, so minutes are «min» («5 min fa»). MW stays MW. `°` and `%` stay.
+- "ago" goes after the time: «{count} min fa». When a placeholder already holds a localized "ago" text (`{age}`, `{ago}`), do not add «fa» again.
+- English loanwords that Italian UIs use as they are stay in English: feed, live, cockpit, briefing, preset, overlay, layout, snapshot, tile, provider, timeout, payload, bloom, scope.
+
+## Plurals
+
+A `tn()` entry needs three forms. `Intl.PluralRules('it')` picks:
+
+| Form    | Counts                                 | Example                 |
+| ------- | -------------------------------------- | ----------------------- |
+| `one`   | 1                                      | 1 telecamera            |
+| `many`  | 1 000 000, 2 000 000… (exact millions) | 1 000 000 di telecamere |
+| `other` | everything else: 0, 2–999 999, 1,5…    | 3 telecamere            |
+
+The `many` form is the `other` text with «di» after the number when a noun follows: «{count} di telecamere caricate», «{count} DI CHIAVI IN ATTESA». When no noun follows the number («{count} vicine», «{count} RICEVUTI»), `many` repeats `other`. Nouns that do not change in the plural keep one form for all three (`{count} file`, `{count} data center`), with «di» in `many`.
+
+## Glossary
+
+| English                                       | Italiano                                                     |
+| --------------------------------------------- | ------------------------------------------------------------ |
+| layer / data layer                            | livello / livello dati                                       |
+| feed / source / data source                   | feed / fonte / fonte dati                                    |
+| LIVE (status) / live data                     | LIVE / dati live                                             |
+| SIMULATED                                     | SIMULATO                                                     |
+| stale / degraded / unavailable                | obsoleto / degradato / non disponibile                       |
+| retry / retrying                              | riprova / nuovo tentativo                                    |
+| rate limited                                  | limite di richieste (raggiunto)                              |
+| key (API key) / POWER UP / POWERED UP         | chiave / ACCENDI / ACCESO                                    |
+| Provider Settings                             | Impostazioni provider                                        |
+| ON / OFF (state chips)                        | ON / OFF                                                     |
+| enable / disable                              | attivare / disattivare                                       |
+| globe / map / map source / map stack          | globo / mappa / fonte mappa / stack mappa                    |
+| basemap / box (Recent Imagery area)           | mappa di base / riquadro                                     |
+| aircraft, plane / flight / military flights   | aereo / volo / voli militari                                 |
+| vessel, ship                                  | nave                                                         |
+| satellite / shell (Starlink) / DENSE          | satellite / shell / DENSO                                    |
+| launch (rocket) / launch site / space mission | lancio / sito di lancio / missione spaziale                  |
+| ascent / replay / payload / stage             | salita / replay / payload / stadio                           |
+| contact / tracking                            | contatto / tracciamento                                      |
+| installation / site                           | installazione / sito                                         |
+| mapped / observed                             | mappato / osservato                                          |
+| camera (view) / camera, CCTV camera           | camera / telecamera, telecamera CCTV                         |
+| earthquake / active fire / fire perimeter     | terremoto / incendio attivo / perimetro dell'incendio        |
+| advisory (NHC/CPHC cyclone) / cone            | bollettino / cono di incertezza                              |
+| radio station / broadcaster                   | stazione radio / emittente                                   |
+| road / flow (traffic)                         | strada / flusso                                              |
+| transit / bike share                          | trasporto pubblico / bike sharing                            |
+| scene / shot / scene recipe                   | scena / scatto / ricetta della scena                         |
+| anchor / data pack / bundle (scene)           | ancora / pacchetto dati / pacchetto                          |
+| story beat                                    | tappa del racconto                                           |
+| briefing / panel / dock                       | briefing / pannello / dock                                   |
+| cockpit                                       | cockpit                                                      |
+| preset / visual preset                        | preset / preset visivo                                       |
+| Tactical / Operator / Minimal / Cyber         | Tattico / Operatore / Minimale / Cyber                       |
+| Scope (circular viewport mask) / keyhole      | scope / foro                                                 |
+| feather / fade                                | sfumatura / dissolvenza                                      |
+| detection overlay                             | overlay di rilevamento                                       |
+| pin (Draw tool) / mark                        | segnaposto / segno                                           |
+| pin (Recent Imagery)                          | fissare                                                      |
+| Draw / Directions (tools)                     | Disegno / Indicazioni                                        |
+| Street Level (layer) / Street View (Google)   | Vista stradale / Street View                                 |
+| Recent Imagery                                | Immagini recenti                                             |
+| Global Context / Context (panel)              | Contesto globale / Contesto                                  |
+| heading, course / altitude / ground speed     | prua, rotta / altitudine / velocità al suolo (VEL. AL SUOLO) |
+| HDG / BRG / CRS / FOV / DEST                  | HDG / BRG / CRS / FOV / DEST (unchanged)                     |
+| RANGE / PITCH / HGT (CCTV calibration)        | PORTATA / INCL. / ALT.                                       |
+| PREV / NEXT                                   | PREC / SUCC                                                  |
+| Previous / Next (button text)                 | Precedente / Successivo                                      |
+| L / R (relative bearing)                      | S / D                                                        |
+| SIG / NEWS / LOCAL (briefing tabs)            | SIG / NOTIZIE / LOCALE                                       |
+| compass points (N, NNE, …, W, NW)             | N, NNE, …, O, NO (west is «O», ovest)                        |
+| NOT AN ALL-CLEAR                              | NON È UN VIA LIBERA                                          |
+| weather field / model / valid / issued        | campo / modello / valida / emessa                            |
+| click / click to …                            | fai clic / clic per …                                        |

scripts/package-boundaries.json

@@ -440,6 +440,7 @@
       "src/i18n/index.js",
       "src/i18n/locale.js",
       "src/i18n/locales/es.json",
+      "src/i18n/locales/it.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/it.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/it.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/it.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/it.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/it.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/it.json",
       "src/i18n/locales/ru.json",
       "src/i18n/locales/zh-CN.json",
       "src/i18n/locales/zh-Hant.json",
@@ -631,6 +638,7 @@
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       "src/i18n/locale.js",
       "src/i18n/locales/es.json",
+      "src/i18n/locales/it.json",
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       "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/it.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/it.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/it.json",
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       "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/it.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/it.json",
       "src/i18n/locales/ru.json",
       "src/i18n/locales/zh-CN.json",
       "src/i18n/locales/zh-Hant.json"
@@ -1109,6 +1122,7 @@
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       "src/i18n/locale.js",
       "src/i18n/locales/es.json",
+      "src/i18n/locales/it.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/it.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/it.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/it.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/it.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/it.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/it.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/it.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/it.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/it.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/it.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/it.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/it.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/it.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/it.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/it.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/it.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/it.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/it.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/it.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/it.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/it.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/it.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/it.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/it.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/it.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/it.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/it.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/it.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/it.json",
       "src/i18n/locales/ru.json",
       "src/i18n/locales/zh-CN.json",
       "src/i18n/locales/zh-Hant.json",

src/i18n/i18n.test.mjs

@@ -35,6 +35,8 @@ test('normalizeLocale folds regional variants and rejects unshipped tags', () =>
   assert.equal(normalizeLocale(' RU '), 'ru');
   assert.equal(normalizeLocale('en_GB'), 'en');
   assert.equal(normalizeLocale('xx'), null);
+  assert.equal(normalizeLocale('it-IT'), 'it');
+  assert.equal(normalizeLocale('it_CH'), 'it');
   // Explicit script tags take precedence over regional defaults.
   assert.equal(normalizeLocale('zh'), 'zh-CN');
   assert.equal(normalizeLocale('zh-CN'), 'zh-CN');

src/i18n/index.js

@@ -17,11 +17,18 @@ import {
   writeStoredLocale,
 } from './locale.js';
 import es from './locales/es.json' with { type: 'json' };
+import it from './locales/it.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,
+  it,
+  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',
+  'it',
+  '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',
+  it: 'Italiano',
   ru: 'Русский',
   'zh-CN': '中文（简体）',
   'zh-Hant': '中文（繁體）',

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', 'it', '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', 'it', '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', 'it', 'ru', 'zh-CN', 'zh-Hant'],
   );
   const rows = buildLocaleOptions({
     locales: MANY,