fix: restore automatic language flags

public/images/flags/countries/jp.svg

@@ -0,0 +1,11 @@
+<svg xmlns="http://www.w3.org/2000/svg" id="flag-icons-jp" viewBox="0 0 512 512">
+  <defs>
+    <clipPath id="jp-a">
+      <path fill-opacity=".7" d="M177.2 0h708.6v708.7H177.2z"/>
+    </clipPath>
+  </defs>
+  <g fill-rule="evenodd" stroke-width="1pt" clip-path="url(#jp-a)" transform="translate(-128)scale(.72249)">
+    <path fill="#fff" d="M0 0h1063v708.7H0z"/>
+    <circle cx="523.1" cy="344.1" r="194.9" fill="#bc002d" transform="translate(-59.7 -34.5)scale(1.1302)"/>
+  </g>
+</svg>