Localizable Modern Red / Vintage Blue switch.

src/_locales/en/messages.json

@@ -689,6 +689,15 @@
   "themeAuto": {
     "message": "Auto"
   },
+  "ModernRed": {
+    "message": "Modern Red"
+  },
+  "VintageBlue": {
+    "message": "Vintage Blue"
+  },
+  "toVintageBlue": {
+    "message": "Switch to the Vintage Blue style"
+  },
   "DonateShort": {
     "message": "Donate"
   },

src/ui/options.html

@@ -114,14 +114,14 @@ SPDX-License-Identifier: GPL-3.0-or-later
      <input id="theme-light" type="radio"  name="theme" value="light"/><label for="theme-light">__MSG_themeLight__</label>
      <input id="theme-auto" type="radio" name="theme" value="auto" checked="checked"/><label for="theme-auto">__MSG_themeAuto__</label>
     </span>
-    <span id="vintageTheme-opt" title="Vintage Blue ON/OFF">
-      <label for="opt-vintageTheme" title="Modern Red">Modern Red</label>
+    <span id="vintageTheme-opt" title="__MSG_toVintageBlue__">
+      <label for="opt-vintageTheme" title="__MSG_ModernRed__">>__MSG_ModernRed__</label>
           <label class="switch">
             <input type="checkbox" id="opt-vintageTheme">
             <span class="slider round"></span>
-            <span class="inner-label">Vintage Blue On/Off</span>
+            <span class="inner-label">__MSG_toVintageBlue__</span>
           </label>
-      <label for="opt-vintageTheme" title="Vintage Blue">Vintage Blue</label>
+      <label for="opt-vintageTheme" title="__MSG_VintageBlue__">__MSG_VintageBlue__</label>
     </span>
     <span id="highContrast-opt">
     <input type="checkbox" id="opt-highContrast">