Start of multilanguage support integration

Improved controls (WASD)

language.js

@@ -0,0 +1,34 @@
+const en = {
+    controls: "Controls:" +
+    "<br>" +
+    "Left+Right/A+D -> Move left/right or down\n" +
+    "<br>" +
+    "Q/E -> Rotate the tile" +
+    "<br>" +
+    "Down/S -> Drop the tile faster"
+};
+
+class Language {
+
+    constructor(lang) {
+        this.lang = lang;
+        if(eval('typeof ' + this.lang) === 'undefined')
+            this.lang = "en";
+    }
+
+    getStr(str, defaultStr) {
+        const retStr = eval('eval(this.lang).' + str);
+        if(typeof retStr !== 'undefined')
+            return retStr;
+        if(typeof defaultStr !== 'undefined')
+            return defaultStr;
+        return eval('en.' + str);
+    }
+}
+
+function switchLang(lang) {
+    const l = new Language(lang);
+    document.getElementById("controls").innerHTML = l.getStr("controls");
+}
+
+switchLang("en");