updated lang

dist/lang.js

@@ -47,6 +47,14 @@ var Lang;
             throw 'language id does not exist';
     }
     Lang.setLang = setLang;
+    function template(str, args) {
+        return str.replace(/{\w+}/g, str => {
+            let key = str.substring(1, str.length - 1);
+            if (key in args)
+                return args[key];
+            return key;
+        });
+    }
     /**
      * reads language json
      * @param id ex: discord.error.noActiveQueue
@@ -59,7 +67,7 @@ var Lang;
             if (key in finding) {
                 let found = finding[key];
                 if (typeof found === 'string')
-                    return found;
+                    return template(found, args);
                 finding = found;
             }
             else