diff --git a/ui/scripts/check-i18n-catalogs.mjs b/ui/scripts/check-i18n-catalogs.mjs
index 5c4c93ff..5898f7e1 100644
--- a/ui/scripts/check-i18n-catalogs.mjs
+++ b/ui/scripts/check-i18n-catalogs.mjs
@@ -34,6 +34,9 @@ export function catalogReport() {
 const PILOT_FILES = [
   'src/components/MainContent/TabFilter.tsx',
   'src/components/MainContent/MainContent.tsx',
+  'src/components/MainContent/MediaFeedItem.tsx',
+  'src/components/MainContent/VideoExtraInfoDialog.tsx',
+  'src/components/MainContent/VideoInfoBar.tsx',
   'src/components/SettingsDrawer/SettingsDrawer.tsx',
   'src/components/SettingsDrawer/SystemSettingsPanel.tsx',
   'src/components/ActivityFooter.tsx',
@@ -48,6 +51,7 @@ const FORBIDDEN = [
   'Output folders',
   'Pregunta al mago',
   'Carpetas de salida',
+  'Extra info',
 ]
 
 export function forbiddenLiterals() {
diff --git a/ui/src/components/MainContent/MediaFeedItem.tsx b/ui/src/components/MainContent/MediaFeedItem.tsx
index 5e94415c..8684aaf6 100644
--- a/ui/src/components/MainContent/MediaFeedItem.tsx
+++ b/ui/src/components/MainContent/MediaFeedItem.tsx
@@ -2,6 +2,7 @@ import { useState, useRef, useEffect, useCallback, useMemo, type CSSProperties }
 import { Play, Pencil, RefreshCw, Copy, Trash2, Check, Combine, Loader2, Heart, ArrowLeftToLine, Download, FolderInput, Scissors, FastForward, BookMarked, BookOpen, Box, Film, BadgeInfo, Clock3 } from 'lucide-react'
 import { SaveRecipeDialog } from '../Recipes/SaveRecipeDialog'
 import { VideoExtraInfoDialog } from './VideoExtraInfoDialog'
+import { useUiTranslation } from '../../i18n'
 import { useStore } from '../../stores/useStore'
 import { getStoredAssetUrl, fetchOutputMetadata, getFileUrl, moveOutput, uploadImage, loadComicProject, selectPipelineClipVideo } from '../../api/client'
 import type { OutputFile, OutputMetadata } from '../../types'
@@ -83,6 +84,7 @@ function RetryImage({ url, alt }: { url: string; alt: string }) {
 }
 
 export function MediaFeedItem({ file, index, isActive, onVisible, onMeasured, style }: Props) {
+  const { t } = useUiTranslation('activity')
   const setSelectedOutput = useStore(s => s.setSelectedOutput)
   const setMediaFilter = useStore(s => s.setMediaFilter)
   const loadSettingsFromOutput = useStore(s => s.loadSettingsFromOutput)
@@ -864,7 +866,7 @@ export function MediaFeedItem({ file, index, isActive, onVisible, onMeasured, st
                 title="Generate descriptions and social copy from saved prompts"
               >
                 <BadgeInfo size={13} />
-                Extra info
+                {t('extraInfo')}
               </button>
             </>
           )}
diff --git a/ui/src/components/MainContent/VideoExtraInfoDialog.tsx b/ui/src/components/MainContent/VideoExtraInfoDialog.tsx
index f0e7bfb3..b5b78d68 100644
--- a/ui/src/components/MainContent/VideoExtraInfoDialog.tsx
+++ b/ui/src/components/MainContent/VideoExtraInfoDialog.tsx
@@ -2,6 +2,7 @@ import { useEffect, useState } from 'react'
 import { createPortal } from 'react-dom'
 import { BadgeInfo, CalendarDays, Check, Clock3, Copy, FileVideo2, Languages, Loader2, MessageSquareText, RefreshCw, SlidersHorizontal, Sparkles, X, Youtube } from 'lucide-react'
 import { fetchVideoExtraInfo, generateVideoExtraInfo } from '../../api/client'
+import { useUiTranslation } from '../../i18n'
 import { formatGenerationBreakdown, formatGenerationDuration } from '../../lib/generationTiming'
 import type { VideoClipInfo, VideoExtraInfo, VideoExtraInfoStatus } from '../../types'
 
@@ -110,6 +111,7 @@ function clipInfoAsText(clip: VideoClipInfo) {
 }
 
 export function VideoExtraInfoDialog({ name, onClose }: { name: string; onClose: () => void }) {
+  const { t } = useUiTranslation('activity')
   const [language, setLanguage] = useState(initialLanguage)
   const [status, setStatus] = useState<VideoExtraInfoStatus | null>(null)
   const [data, setData] = useState<VideoExtraInfo | null>(null)
@@ -192,7 +194,7 @@ export function VideoExtraInfoDialog({ name, onClose }: { name: string; onClose:
             <BadgeInfo size={18} />
           </div>
           <div className="min-w-0 flex-1">
-            <h2 id="video-extra-info-title" className="text-sm font-semibold text-text-primary">Extra info</h2>
+            <h2 id="video-extra-info-title" className="text-sm font-semibold text-text-primary">{t('extraInfo')}</h2>
             <p className="mt-1 truncate text-[11px] text-text-muted" title={name}>{name}</p>
           </div>
           <button
diff --git a/ui/src/components/MainContent/VideoInfoBar.tsx b/ui/src/components/MainContent/VideoInfoBar.tsx
index 612f1aa4..f3a7b51d 100644
--- a/ui/src/components/MainContent/VideoInfoBar.tsx
+++ b/ui/src/components/MainContent/VideoInfoBar.tsx
@@ -1,6 +1,7 @@
 import { useState, useRef } from 'react'
 import { Pencil, RefreshCw, Copy, Trash2, Check, Combine, Loader2, Sparkles, Mic, BadgeInfo, Music2 } from 'lucide-react'
 import { useStore } from '../../stores/useStore'
+import { useUiTranslation } from '../../i18n'
 import { getStoredAssetUrl } from '../../api/client'
 import { modelDisplayName } from '../../lib/modelDisplay'
 import { formatGenerationBreakdown, formatGenerationDuration } from '../../lib/generationTiming'
@@ -8,6 +9,7 @@ import { VideoExtraInfoDialog } from './VideoExtraInfoDialog'
 import { AlternativeSongsDialog, canRemountVideoclip } from './AlternativeSongsDialog'
 
 export function VideoInfoBar() {
+  const { t } = useUiTranslation('activity')
   const outputs = useStore(s => s.filteredOutputs())
   const selectedOutput = useStore(s => s.selectedOutput)
   const meta = useStore(s => s.selectedOutputMeta)
@@ -211,7 +213,7 @@ export function VideoInfoBar() {
               title="Generate descriptions and social copy from saved prompts"
             >
               <BadgeInfo size={14} />
-              Extra info
+              {t('extraInfo')}
             </button>
             {canRemountVideoclip(selected) && (
               <button
diff --git a/ui/src/features/assets/AssetsPanel.tsx b/ui/src/features/assets/AssetsPanel.tsx
index d909cb45..a7146fbc 100644
--- a/ui/src/features/assets/AssetsPanel.tsx
+++ b/ui/src/features/assets/AssetsPanel.tsx
@@ -110,7 +110,7 @@ export function AssetsPanel() {
   const inspect = async (asset: AssetCatalogItem) => {
     setInspectorLoading(true); setError('')
     try { setInspecting(await fetchAsset(asset.id)) }
-    catch (reason) { setError(reason instanceof Error ? reason.message : 'No se pudo cargar Extra info') }
+    catch (reason) { setError(reason instanceof Error ? reason.message : tActivity('inspector.loadFailed')) }
     finally { setInspectorLoading(false) }
   }
 
@@ -210,14 +210,82 @@ export function AssetsPanel() {
 
 function AssetExtraInfoDialog({ asset, loading, onClose }: { asset: AssetCatalogItem | null; loading: boolean; onClose: () => void }) {
   const { t: tActivity } = useUiTranslation('activity')
+  const { t: tCommon } = useUiTranslation('common')
   const manifest = asset?.manifest || {}
   const prompts = (manifest.generation as { prompts?: Record<string, unknown> } | undefined)?.prompts || {}
   const timing = (manifest.timing as Record<string, unknown> | undefined) || {}
   const raw = asset ? JSON.stringify(manifest, null, 2) : ''
   const copy = async (value: string) => { await navigator.clipboard?.writeText(value) }
-  return <div className="fixed inset-0 z-[80] flex items-center justify-center bg-black/70 p-4" role="dialog" aria-modal="true" aria-labelledby="asset-extra-info-title" onMouseDown={event => { if (event.target === event.currentTarget) onClose() }}><div className="flex max-h-[90vh] w-full max-w-3xl flex-col overflow-hidden rounded-xl border border-border bg-bg-secondary shadow-2xl"><header className="flex items-center justify-between border-b border-border p-3"><div><h2 id="asset-extra-info-title" className="text-sm font-semibold text-text-primary">{tActivity('extraInfo')}</h2><p className="text-[10px] text-text-muted">{asset?.filename || 'Cargando metadata…'}</p></div><button onClick={onClose} className="rounded px-2 py-1 text-xs text-text-muted hover:bg-bg-hover">Cerrar</button></header>{loading || !asset ? <div className="flex items-center justify-center gap-2 p-12 text-xs text-text-muted"><Loader2 size={15} className="animate-spin" /> Leyendo manifest…</div> : <div className="space-y-4 overflow-y-auto p-4 text-xs"><InfoSection title="Identidad" values={{ asset_id: asset.id, kind: asset.kind, metadata_status: asset.metadata_status, locations: asset.workspace_ids.join(', ') }} /><InfoSection title="Origen y ejecución" values={{ tool: asset.origin.tool, capability: asset.origin.capability, run_id: asset.execution.run_id, task_id: asset.execution.task_id, job_id: asset.execution.job_id, pipeline_id: asset.execution.pipeline_id, status: asset.execution.status }} /><InfoSection title="Modelo y tiempos" values={{ provider: asset.model.provider, model: asset.model.id, created_at: timing.created_at, queued_at: timing.queued_at, started_at: timing.started_at, completed_at: timing.completed_at, queue_seconds: timing.queue_seconds, inference_seconds: timing.inference_seconds, total_seconds: timing.total_seconds }} />{Object.entries(prompts).map(([name, value]) => typeof value === 'string' && value ? <section key={name} className="rounded-lg border border-border bg-bg-primary p-3"><div className="mb-2 flex items-center justify-between"><h3 className="font-semibold text-text-primary">Prompt · {name}</h3><button onClick={() => void copy(value)} className="text-[10px] text-accent-blue">Copiar</button></div><pre className="whitespace-pre-wrap break-words text-[11px] text-text-secondary">{value}</pre></section> : null)}<section className="rounded-lg border border-border bg-bg-primary p-3"><div className="mb-2 flex items-center justify-between"><h3 className="font-semibold text-text-primary">JSON completo</h3><button onClick={() => void copy(raw)} className="text-[10px] text-accent-blue">Copiar JSON</button></div><pre className="max-h-72 overflow-auto whitespace-pre-wrap break-words text-[10px] text-text-muted">{raw || 'Metadata no disponible'}</pre></section></div>}</div></div>
+  return (
+    <div
+      className="fixed inset-0 z-[80] flex items-center justify-center bg-black/70 p-4"
+      role="dialog"
+      aria-modal="true"
+      aria-labelledby="asset-extra-info-title"
+      onMouseDown={event => { if (event.target === event.currentTarget) onClose() }}
+    >
+      <div className="flex max-h-[90vh] w-full max-w-3xl flex-col overflow-hidden rounded-xl border border-border bg-bg-secondary shadow-2xl">
+        <header className="flex items-center justify-between border-b border-border p-3">
+          <div>
+            <h2 id="asset-extra-info-title" className="text-sm font-semibold text-text-primary">{tActivity('extraInfo')}</h2>
+            <p className="text-[10px] text-text-muted">{asset?.filename || tActivity('inspector.loadingAsset')}</p>
+          </div>
+          <button onClick={onClose} className="rounded px-2 py-1 text-xs text-text-muted hover:bg-bg-hover">{tCommon('actions.close')}</button>
+        </header>
+        {loading || !asset ? (
+          <div className="flex items-center justify-center gap-2 p-12 text-xs text-text-muted">
+            <Loader2 size={15} className="animate-spin" /> {tActivity('inspector.readingManifest')}
+          </div>
+        ) : (
+          <div className="space-y-4 overflow-y-auto p-4 text-xs">
+            <InfoSection
+              title={tActivity('inspector.identity')}
+              values={{ asset_id: asset.id, kind: asset.kind, metadata_status: asset.metadata_status, locations: asset.workspace_ids.join(', ') }}
+            />
+            <InfoSection
+              title={tActivity('inspector.origin')}
+              values={{ tool: asset.origin.tool, capability: asset.origin.capability, run_id: asset.execution.run_id, task_id: asset.execution.task_id, job_id: asset.execution.job_id, pipeline_id: asset.execution.pipeline_id, status: asset.execution.status }}
+            />
+            <InfoSection
+              title={tActivity('inspector.modelTiming')}
+              values={{ provider: asset.model.provider, model: asset.model.id, created_at: timing.created_at, queued_at: timing.queued_at, started_at: timing.started_at, completed_at: timing.completed_at, queue_seconds: timing.queue_seconds, inference_seconds: timing.inference_seconds, total_seconds: timing.total_seconds }}
+            />
+            {Object.entries(prompts).map(([name, value]) => typeof value === 'string' && value ? (
+              <section key={name} className="rounded-lg border border-border bg-bg-primary p-3">
+                <div className="mb-2 flex items-center justify-between">
+                  <h3 className="font-semibold text-text-primary">{tActivity('inspector.prompt', { name })}</h3>
+                  <button onClick={() => void copy(value)} className="text-[10px] text-accent-blue">{tActivity('inspector.copy')}</button>
+                </div>
+                <pre className="whitespace-pre-wrap break-words text-[11px] text-text-secondary">{value}</pre>
+              </section>
+            ) : null)}
+            <section className="rounded-lg border border-border bg-bg-primary p-3">
+              <div className="mb-2 flex items-center justify-between">
+                <h3 className="font-semibold text-text-primary">{tActivity('inspector.fullJson')}</h3>
+                <button onClick={() => void copy(raw)} className="text-[10px] text-accent-blue">{tActivity('inspector.copyJson')}</button>
+              </div>
+              <pre className="max-h-72 overflow-auto whitespace-pre-wrap break-words text-[10px] text-text-muted">{raw || tActivity('inspector.unavailable')}</pre>
+            </section>
+          </div>
+        )}
+      </div>
+    </div>
+  )
 }
 
 function InfoSection({ title, values }: { title: string; values: Record<string, unknown> }) {
-  return <section className="rounded-lg border border-border bg-bg-primary p-3"><h3 className="mb-2 font-semibold text-text-primary">{title}</h3><dl className="grid gap-1 sm:grid-cols-2">{Object.entries(values).map(([name, value]) => <div key={name} className="grid grid-cols-[7rem_1fr] gap-2"><dt className="text-text-muted">{name}</dt><dd className="break-all text-text-secondary">{value == null || value === '' ? 'No disponible' : String(value)}</dd></div>)}</dl></section>
+  const { t: tActivity } = useUiTranslation('activity')
+  return (
+    <section className="rounded-lg border border-border bg-bg-primary p-3">
+      <h3 className="mb-2 font-semibold text-text-primary">{title}</h3>
+      <dl className="grid gap-1 sm:grid-cols-2">
+        {Object.entries(values).map(([name, value]) => (
+          <div key={name} className="grid grid-cols-[7rem_1fr] gap-2">
+            <dt className="text-text-muted">{name}</dt>
+            <dd className="break-all text-text-secondary">{value == null || value === '' ? tActivity('inspector.unavailable') : String(value)}</dd>
+          </div>
+        ))}
+      </dl>
+    </section>
+  )
 }
diff --git a/ui/src/i18n/locales/en/activity.json b/ui/src/i18n/locales/en/activity.json
index 18a0bc73..5906a948 100644
--- a/ui/src/i18n/locales/en/activity.json
+++ b/ui/src/i18n/locales/en/activity.json
@@ -3,6 +3,19 @@
   "openHistory": "Show canonical task history",
   "inboxLegacy": "Inbox / Legacy",
   "extraInfo": "Extra info",
+  "inspector": {
+    "loadingAsset": "Loading asset metadata…",
+    "readingManifest": "Reading manifest…",
+    "identity": "Identity",
+    "origin": "Origin and execution",
+    "modelTiming": "Model and timing",
+    "copy": "Copy",
+    "copyJson": "Copy JSON",
+    "fullJson": "Full JSON",
+    "unavailable": "Not available",
+    "loadFailed": "Could not load Extra info",
+    "prompt": "Prompt · {{name}}"
+  },
   "collectionsHint": "Reference collections. They are not output folders.",
   "projectCount_one": "{{count}} project",
   "projectCount_other": "{{count}} projects",
diff --git a/ui/src/i18n/locales/es/activity.json b/ui/src/i18n/locales/es/activity.json
index 0b64e472..26f94264 100644
--- a/ui/src/i18n/locales/es/activity.json
+++ b/ui/src/i18n/locales/es/activity.json
@@ -3,6 +3,19 @@
   "openHistory": "Mostrar el historial canónico de tareas",
   "inboxLegacy": "Inbox / Legacy",
   "extraInfo": "Información adicional",
+  "inspector": {
+    "loadingAsset": "Cargando metadata…",
+    "readingManifest": "Leyendo manifest…",
+    "identity": "Identidad",
+    "origin": "Origen y ejecución",
+    "modelTiming": "Modelo y tiempos",
+    "copy": "Copiar",
+    "copyJson": "Copiar JSON",
+    "fullJson": "JSON completo",
+    "unavailable": "No disponible",
+    "loadFailed": "No se pudo cargar Información adicional",
+    "prompt": "Prompt · {{name}}"
+  },
   "collectionsHint": "Colecciones de referencias. No son carpetas de salida.",
   "projectCount_one": "{{count}} proyecto",
   "projectCount_other": "{{count}} proyectos",
diff --git a/ui/tests/assetsCatalog.test.mjs b/ui/tests/assetsCatalog.test.mjs
index a1d011be..5b8da046 100644
--- a/ui/tests/assetsCatalog.test.mjs
+++ b/ui/tests/assetsCatalog.test.mjs
@@ -42,6 +42,10 @@ test('Assets is a first-class tab with its own panel, not a fake active workspac
   assert.match(panel, /tActivity\('inboxLegacy'\)/)
   assert.match(panel, /tActivity\('extraInfo'\)/)
   assert.match(panel, /outputFolder\.uploads/)
-  assert.match(panel, /JSON completo/)
+  assert.match(panel, /tActivity\('inspector\.fullJson'\)/)
+  assert.match(panel, /tActivity\('inspector\.loadFailed'\)/)
+  assert.match(panel, /tCommon\('actions\.close'\)/)
+  assert.doesNotMatch(panel, /JSON completo/)
+  assert.doesNotMatch(panel, /No se pudo cargar Extra info/)
   assert.doesNotMatch(panel, /setActiveWorkspace|switchWorkspace/)
 })
diff --git a/ui/tests/i18nFoundation.test.tsx b/ui/tests/i18nFoundation.test.tsx
index 733323af..f40c1187 100644
--- a/ui/tests/i18nFoundation.test.tsx
+++ b/ui/tests/i18nFoundation.test.tsx
@@ -70,6 +70,9 @@ test('required glossary keys exist in both languages', async () => {
   assert.equal(i18n.t('entities.outputFolder', { ns: 'navigation', lng: 'es' }), 'Carpeta de salida')
   assert.equal(i18n.t('outputFolder.uploads', { ns: 'navigation', lng: 'es' }), 'Subidas')
   assert.equal(i18n.t('extraInfo', { ns: 'activity', lng: 'es' }), 'Información adicional')
+  assert.equal(i18n.t('inspector.loadFailed', { ns: 'activity', lng: 'en' }), 'Could not load Extra info')
+  assert.equal(i18n.t('inspector.loadFailed', { ns: 'activity', lng: 'es' }), 'No se pudo cargar Información adicional')
+  assert.equal(i18n.t('actions.close', { ns: 'common', lng: 'es' }), 'Cerrar')
 })
 
 test('missing keys fall back to english without throwing', async () => {
@@ -203,3 +206,37 @@ test('catalogs do not rename technical ids', async () => {
 test('migrated chrome no longer hardcodes the pilot phrases', () => {
   assert.deepEqual(forbiddenLiterals(), [])
 })
+
+test('Extra info chrome and the Assets inspector use the activity catalog', async () => {
+  const fs = await import('node:fs/promises')
+  const files = [
+    '../src/components/MainContent/VideoExtraInfoDialog.tsx',
+    '../src/components/MainContent/MediaFeedItem.tsx',
+    '../src/components/MainContent/VideoInfoBar.tsx',
+    '../src/features/assets/AssetsPanel.tsx',
+  ]
+  for (const file of files) {
+    const source = await fs.readFile(new URL(file, import.meta.url), 'utf8')
+    assert.match(source, /t(?:Activity)?\('extraInfo'\)/, file)
+    assert.doesNotMatch(source, />Extra info</, file)
+    assert.doesNotMatch(source, /['"`]Extra info['"`]/, file)
+    assert.doesNotMatch(source, /^\s*Extra info\s*$/m, file)
+  }
+  const panel = await fs.readFile(new URL('../src/features/assets/AssetsPanel.tsx', import.meta.url), 'utf8')
+  for (const key of [
+    'inspector.loadingAsset',
+    'inspector.readingManifest',
+    'inspector.identity',
+    'inspector.origin',
+    'inspector.modelTiming',
+    'inspector.copy',
+    'inspector.copyJson',
+    'inspector.fullJson',
+    'inspector.unavailable',
+    'inspector.loadFailed',
+    'inspector.prompt',
+  ]) {
+    assert.match(panel, new RegExp(`tActivity\\('${key.replace('.', '\\.')}'`), key)
+  }
+  assert.match(panel, /tCommon\('actions\.close'\)/)
+})