diff --git a/electron/main.cjs b/electron/main.cjs
index b2060edb..b80febdf 100644
--- a/electron/main.cjs
+++ b/electron/main.cjs
@@ -190,9 +190,19 @@ function loadRenderer(win) {
 
 /**
  * Packaged (and dev) renderer runs on http://127.0.0.1; hls.js and other fetches hit third-party
- * streams without CORS. Chromium still enforces CORS, so inject a permissive ACAO on subresources only.
+ * streams without CORS. Chromium still enforces CORS, so inject permissive CORS on subresources only.
+ * LanguageTool / LibreTranslate use POST + non-simple Content-Type → preflight must see Allow-Methods /
+ * Allow-Headers, not only ACAO.
  */
 function relaxCorsForRendererSubresources() {
+  const stripCors = new Set([
+    'access-control-allow-origin',
+    'access-control-allow-credentials',
+    'access-control-allow-methods',
+    'access-control-allow-headers',
+    'access-control-expose-headers',
+    'access-control-max-age'
+  ])
   session.defaultSession.webRequest.onHeadersReceived((details, callback) => {
     if (details.resourceType === 'mainFrame' || details.resourceType === 'subFrame') {
       callback({ cancel: false, responseHeaders: details.responseHeaders })
@@ -205,15 +215,15 @@ function relaxCorsForRendererSubresources() {
     }
     const responseHeaders = { ...raw }
     for (const key of Object.keys(responseHeaders)) {
-      const lower = key.toLowerCase()
-      if (
-        lower === 'access-control-allow-origin' ||
-        lower === 'access-control-allow-credentials'
-      ) {
+      if (stripCors.has(key.toLowerCase())) {
         delete responseHeaders[key]
       }
     }
     responseHeaders['Access-Control-Allow-Origin'] = ['*']
+    responseHeaders['Access-Control-Allow-Methods'] = ['GET,HEAD,POST,PUT,PATCH,DELETE,OPTIONS']
+    responseHeaders['Access-Control-Allow-Headers'] = [
+      'Authorization,Content-Type,Accept,Accept-Language,Origin,X-Requested-With'
+    ]
     callback({ cancel: false, responseHeaders })
   })
 }
diff --git a/package-lock.json b/package-lock.json
index fed44b3c..860efc8f 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "imwald",
-  "version": "23.0.5",
+  "version": "23.0.8",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "imwald",
-      "version": "23.0.5",
+      "version": "23.0.8",
       "license": "MIT",
       "dependencies": {
         "@asciidoctor/core": "^3.0.4",
diff --git a/package.json b/package.json
index 5a5e8c5a..a50892e3 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "imwald",
-  "version": "23.0.7",
+  "version": "23.0.8",
   "description": "Imwald — a user-friendly Nostr client focused on relay feed browsing, publications, and relay discovery",
   "private": true,
   "type": "module",
diff --git a/src/components/AdvancedEventLab/AdvancedEventLabDialog.tsx b/src/components/AdvancedEventLab/AdvancedEventLabDialog.tsx
index 9453cee6..0a971d3a 100644
--- a/src/components/AdvancedEventLab/AdvancedEventLabDialog.tsx
+++ b/src/components/AdvancedEventLab/AdvancedEventLabDialog.tsx
@@ -21,6 +21,7 @@ import { languageToolLintExtension, requestAdvancedLabGrammarLint } from '@/lib/
 import { pickLanguageToolCodeForTranslateTarget } from '@/lib/languagetool-language-order'
 import {
   filterTranslateLanguagesWithGrammarCatalog,
+  TRANSLATE_GRAMMAR_LANGUAGE_OPTIONS,
   translateLanguageOptionMatchesQuery
 } from '@/lib/language-display-meta'
 import { LanguageSelectOptionLines } from '@/lib/language-select-option-lines'
@@ -536,21 +537,29 @@ export default function AdvancedEventLabDialog({
     void fetchTranslateLanguages()
       .then((list) => {
         if (cancelled) return
-        const filtered = filterTranslateLanguagesWithGrammarCatalog(list)
-        if (!filtered.length) {
+        const base = list.length > 0 ? list : TRANSLATE_GRAMMAR_LANGUAGE_OPTIONS
+        const filtered = filterTranslateLanguagesWithGrammarCatalog(base)
+        const resolved = filtered.length > 0 ? filtered : TRANSLATE_GRAMMAR_LANGUAGE_OPTIONS
+        if (!resolved.length) {
           setTranslateLangs([])
           setTranslateLoad('empty')
           return
         }
-        setTranslateLangs(filtered)
+        setTranslateLangs([...resolved])
         setTranslateSource('auto')
-        const codes = filtered.map((l) => l.code)
+        const codes = resolved.map((l) => l.code)
         const tgt = codes.includes('en') ? 'en' : codes[0]!
         setTranslateTarget(tgt)
         setTranslateLoad('ready')
       })
       .catch(() => {
-        if (!cancelled) setTranslateLoad('error')
+        if (cancelled) return
+        const resolved = TRANSLATE_GRAMMAR_LANGUAGE_OPTIONS
+        setTranslateLangs([...resolved])
+        setTranslateSource('auto')
+        const codes = resolved.map((l) => l.code)
+        setTranslateTarget(codes.includes('en') ? 'en' : codes[0]!)
+        setTranslateLoad('ready')
       })
     return () => {
       cancelled = true
diff --git a/src/components/NoteOptions/useMenuActions.tsx b/src/components/NoteOptions/useMenuActions.tsx
index 769ddcbc..768d7d91 100644
--- a/src/components/NoteOptions/useMenuActions.tsx
+++ b/src/components/NoteOptions/useMenuActions.tsx
@@ -70,6 +70,7 @@ import {
 import {
   filterTranslateLanguagesWithGrammarCatalog,
   languageSelectSingleLine,
+  TRANSLATE_GRAMMAR_LANGUAGE_OPTIONS,
   TRANSLATE_LANGUAGE_MENU_ITEM_CLASS
 } from '@/lib/language-display-meta'
 
@@ -187,10 +188,18 @@ export function useMenuActions({
       return
     }
     let cancelled = false
-    void fetchTranslateLanguages().then((list) => {
-      if (cancelled) return
-      setTranslateMenuOptions(filterTranslateLanguagesWithGrammarCatalog(list))
-    })
+    void fetchTranslateLanguages()
+      .then((list) => {
+        if (cancelled) return
+        const base = list.length > 0 ? list : TRANSLATE_GRAMMAR_LANGUAGE_OPTIONS
+        const filtered = filterTranslateLanguagesWithGrammarCatalog(base)
+        setTranslateMenuOptions(
+          filtered.length > 0 ? filtered : TRANSLATE_GRAMMAR_LANGUAGE_OPTIONS
+        )
+      })
+      .catch(() => {
+        if (!cancelled) setTranslateMenuOptions(TRANSLATE_GRAMMAR_LANGUAGE_OPTIONS)
+      })
     return () => {
       cancelled = true
     }