refactor: use de gruyter ci

frontend/static/degruyter-icons/Simple/Medium-24px/SVG/Action/Language.svg

@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<svg width="24px" height="24px" viewBox="0 0 24 24" version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
+    <title>🧩 Icons/Simple/Action/24px/Language</title>
+    <g id="🧩-Icons/Simple/Action/24px/Language" stroke="none" stroke-width="1" fill="none" fill-rule="evenodd">
+        <path d="M17,8 L22,22 L20,22 L18.572,18 L13.428,18 L12,22 L10,22 L15,8 L17,8 Z M14,4 L14,6 L12.5348154,6.0011841 C12.1495741,8.55549038 11.0370207,10.9086532 9.38080105,12.8058775 C9.88410496,13.1376127 10.4147812,13.4323141 10.9690677,13.6856413 L10.3610551,15.3858956 C9.55752318,15.0296381 8.79598697,14.5984019 8.08507244,14.100813 C6.8581182,15.1680811 5.42431719,16.0225734 3.83290699,16.5952635 L3.5310603,16.6998649 L3.49922882,16.709 L3.49950903,14.79826 C4.66299053,14.3459468 5.72437713,13.7177163 6.65713591,12.9503808 C5.18414331,11.5882478 4.01636248,9.90268848 3.26122882,8.00062899 L5.22209411,8.00104329 C5.88547498,9.41159841 6.81828393,10.6656331 7.95615463,11.6987811 C9.36916129,10.1096851 10.3364231,8.14219904 10.7111978,6.00069627 L2,6 L2,4 L7,4 L7,2 L9,2 L9,4 L14,4 Z M16,10.8 L14.143,16 L17.857,16 L16,10.8 Z" id="Primary" fill="#000000"></path>
+    </g>
+</svg>