diff --git a/.github/workflows/test-appimage-native.yml b/.github/workflows/test-appimage-native.yml
index 163709e0..6bbdeba9 100644
--- a/.github/workflows/test-appimage-native.yml
+++ b/.github/workflows/test-appimage-native.yml
@@ -45,7 +45,8 @@ jobs:
           test "$(uname -m)" = '${{ matrix.arch }}'
           python -B -m unittest discover -s tests -p test_appimage_arch.py -v
       - name: Refresh package indexes for bundled monitoring tools
-        run: sudo apt-get update
+        # Third-party runner repositories occasionally fail; the build reports missing tools.
+        run: sudo apt-get update || true
       - name: Build native AppImage without publishing it
         run: bash AppImage/scripts/build_appimage.sh
       - name: Reject foreign ELF payloads
diff --git a/AppImage/scripts/build_appimage.sh b/AppImage/scripts/build_appimage.sh
index 1b28e223..be49cf1c 100755
--- a/AppImage/scripts/build_appimage.sh
+++ b/AppImage/scripts/build_appimage.sh
@@ -70,8 +70,15 @@ if [ ! -s "$WORK_DIR/appimagetool" ]; then
     cp -f "$WORK_DIR/appimagetool" "$APPIMAGETOOL_CACHE"
 fi
 
+APPIMAGETOOL_ARGS=()
 if [ "$PMX_APPIMAGE_ARCH" = aarch64 ]; then
     echo "f0837e7448a0c1e4e650a93bb3e85802546e60654ef287576f46c71c126a9158  $WORK_DIR/appimagetool" | sha256sum -c -
+    # Without --runtime-file, appimagetool 1.9.1 embeds the unpinned
+    # `continuous` runtime. Use a released runtime checked by its digest.
+    RUNTIME_URL="https://github.com/AppImage/type2-runtime/releases/download/20251108/runtime-aarch64"
+    wget --tries=3 --timeout=60 "$RUNTIME_URL" -O "$WORK_DIR/runtime-aarch64"
+    echo "00cbdfcf917cc6c0ff6d3347d59e0ca1f7f45a6df1a428a0d6d8a78664d87444  $WORK_DIR/runtime-aarch64" | sha256sum -c -
+    APPIMAGETOOL_ARGS=(--runtime-file "$WORK_DIR/runtime-aarch64")
 fi
 
 # Create directory structure
@@ -623,7 +630,7 @@ echo "🔨 Building unified AppImage v${VERSION}..."
 cd "$WORK_DIR"
 export NO_CLEANUP=1
 export APPIMAGE_EXTRACT_AND_RUN=1
-ARCH="$PMX_APPIMAGE_ARCH" ./appimagetool --no-appstream --verbose "$APP_DIR" "$APPIMAGE_NAME"
+ARCH="$PMX_APPIMAGE_ARCH" ./appimagetool --no-appstream --verbose "${APPIMAGETOOL_ARGS[@]}" "$APP_DIR" "$APPIMAGE_NAME"
 
 # Move to dist directory
 mv "$APPIMAGE_NAME" "$DIST_DIR/"
diff --git a/lang/de.json b/lang/de.json
index 5fb5aba4..5de23f68 100644
--- a/lang/de.json
+++ b/lang/de.json
@@ -4398,7 +4398,7 @@
   "Name or part of the option or of the application": "Name oder Teil der Option oder der Anwendung",
   "Name:": "Name:",
   "Named accounts need private mode. Stop the container, set public: false in /config/config.js, start it again and create each user with: pct exec <CTID> -- env THELOUNGE_HOME=/config s6-setuidgid abc thelounge add <user>": "Benannte Konten benötigen einen privaten Modus. Stoppen Sie den Container, setzen Sie public: false in /config/config.js, starten Sie ihn erneut und erstellen Sie jeden Benutzer mit: pct exec <CTID> -- env THELOUNGE_HOME=/config s6-setuidgid abc thelounge add <user>",
-  "Native Borg is unavailable. Install the native borgbackup package on this host to use Borg backups.": "Eine native Borg-Version ist nicht verfügbar. Installiere das native Paket borgbackup auf diesem Host, um Borg-Sicherungen zu verwenden.",
+  "Native Borg is unavailable. Install the native borgbackup package on this host to use Borg backups.": "Natives Borg ist nicht verfügbar. Installieren Sie das native Paket borgbackup auf diesem Host, um Borg-Backups zu verwenden.",
   "Needed:": "Erforderlich:",
   "Needs": "Benötigt",
   "Neither /etc/kernel/cmdline nor /etc/default/grub found.": "Weder /etc/kernel/cmdline noch /etc/default/grub gefunden.",
diff --git a/lang/es.json b/lang/es.json
index df469663..5948fc98 100644
--- a/lang/es.json
+++ b/lang/es.json
@@ -4393,7 +4393,7 @@
   "Name or part of the option or of the application": "Nombre o parte de la opción o de la aplicación",
   "Name:": "Nombre:",
   "Named accounts need private mode. Stop the container, set public: false in /config/config.js, start it again and create each user with: pct exec <CTID> -- env THELOUNGE_HOME=/config s6-setuidgid abc thelounge add <user>": "Las cuentas con nombre necesitan el modo privado. Detén el contenedor, pon public: false en /config/config.js, vuelve a arrancarlo y crea cada usuario con: pct exec <CTID> -- env THELOUNGE_HOME=/config s6-setuidgid abc thelounge add <user>",
-  "Native Borg is unavailable. Install the native borgbackup package on this host to use Borg backups.": "Borg nativo no está disponible. Instala el paquete borgbackup nativo en este host para usar las copias de seguridad de Borg.",
+  "Native Borg is unavailable. Install the native borgbackup package on this host to use Borg backups.": "Borg nativo no está disponible. Instala el paquete borgbackup nativo en este host para usar los backups de Borg.",
   "Needed:": "Necesario:",
   "Needs": "Necesita",
   "Neither /etc/kernel/cmdline nor /etc/default/grub found.": "No se encontraron /etc/kernel/cmdline ni /etc/default/grub.",