I copied the files to the folder with the localization.

localized-files/ru/static/css/wallpaper.css

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+body {
+    background: #153E3F;
+    color: white;
+    font-family: 'Roboto', serif;
+}
+
+@media (min-width: 0) {
+    .wallpaper img {
+        width: 90%;
+        border-radius: 8px;
+        margin: 0 auto 0 auto;
+        display: flex;
+    }
+
+    .wallpaper h1 {
+        text-align: center;
+    }
+
+    .copyright {
+        font-size: 110%;
+        width: 90%;
+    }
+
+    p {
+        margin-left: auto;
+        margin-right: auto;
+    }
+
+    .desc {
+        font-size: 125%;
+        line-height: 32px;
+        width: 90%;
+    }
+
+    .wallpaper-text {
+      display: flex;
+      flex-direction: column-reverse;
+    }
+
+    .get-it-on {
+        display: flex;
+        margin: 5% auto 3% auto;
+    }
+
+}
+
+@media (min-width: 768px) {
+    .get-it-on {
+        display: flex;
+        margin: 5% auto 3% auto;
+    }
+
+    .desc {
+        font-size: 150%;
+        line-height: 39px;
+        width: 90%;
+    }
+
+    .copyright {
+        font-size: 125%;
+        width: 90%;
+    }
+}
+
+@media (min-width: 992px) {
+    .wallpaper img {
+        width: 65%;
+        border-radius: 8px;
+        margin: 0 auto 0 auto;
+        display: flex;
+    }
+
+    .desc {
+        font-size: 200%;
+        line-height: 45px;
+        width: 90%;
+    }
+
+    .copyright {
+        font-size: 150%;
+        width: 90%;
+    }
+
+    .wallpaper h1 {
+        text-align: center;
+        font-size: 250%;
+    }
+
+}
+
+@media (min-width: 1200px) {
+    .wallpaper img {
+        width: 40%;
+        border-radius: 8px;
+        float: left;
+    }
+
+    .wallpaper-text {
+      display: flex;
+      flex-direction: column;
+    }
+
+    .desc {
+        font-size: 150%;
+        line-height: 36px;
+        width: 90%;
+    }
+
+    .copyright {
+        font-size: 120%;
+    }
+
+    .get-it-on {
+        display: block ;
+        width: 70%;
+        margin-left: 15%;
+        margin-right: auto;
+    }
+}
+
+@media (min-width: 1400px) {
+    .wallpaper img {
+        max-width: 27%;
+    }
+}

localized-files/ru/static/script/wallpaperLoad.js

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+function load(date) {
+    fetch(`https://api.starlio.space/wallpaper/${date}`).then(res => {
+        res.json().then(data => {
+            if (data.length === 0) return;
+
+            document.querySelector("div.wallpaper img").src = data.url;
+            document.querySelector("div.wallpaper div.wallpaper-text div.wallpaper-desc h1").innerHTML = data.title;
+            document.querySelector(".copyright").innerHTML = `Image Credit & Copyright: ${data.copyright}`;
+            document.querySelector(".desc").innerHTML = data.explanation;
+        });
+    });
+}
+
+function parseURL() {
+    let pathname = document.location.pathname
+    pathname = pathname.slice(pathname.lastIndexOf('/')+1)
+
+    if (isNaN(new Date(pathname).getTime())) return null;
+    if (!isValidDate(pathname)) return null;
+
+    return pathname;
+}
+
+
+/* THX, bro <3
+ https://stackoverflow.com/a/35413963/20781634
+ */
+function isValidDate(dateString) {
+  var regEx = /^\d{4}-\d{2}-\d{2}$/;
+  if(!dateString.match(regEx)) return false;
+  var d = new Date(dateString);
+  var dNum = d.getTime();
+  if(!dNum && dNum !== 0) return false;
+  return d.toISOString().slice(0,10) === dateString;
+}
+
+load(parseURL());