translation prefixes for custom options.xml

source/funkin/options/OptionsMenu.hx

@@ -162,6 +162,10 @@ class OptionsMenu extends TreeMenu {
 			}
 			var name = node.getAtt("name");
 			var desc = node.getAtt("desc").getDefault("optionsMenu.desc-missing");
+			if (screen.prefix?.length > 0) {
+				name = screen.prefix + name;
+				if (node.has.desc) desc = screen.prefix + desc;
+			}
 
 			switch(node.name) {
 				case "checkbox":
@@ -210,7 +214,7 @@ class OptionsMenu extends TreeMenu {
 					options.push(new SliderOption(name, desc, Std.parseFloat(node.att.min), Std.parseFloat(node.att.max), step, segments, node.att.id, Std.parseInt(node.att.barWidth), null, FlxG.save.data));
 				case "menu":
 					options.push(new TextOption(name, desc, ' >', () -> {
-						var screen = new TreeMenuScreen(name, desc);
+						var screen = new TreeMenuScreen(name, desc, node.getAtt("prefix").getDefault(""));
 						for (o in parseOptionsFromXML(screen, node)) screen.add(o);
 						addMenu(screen);
 					}));

source/funkin/options/TreeMenuScreen.hx

@@ -60,7 +60,7 @@ class TreeMenuScreen extends FlxSpriteGroup {
 	var curFloatOption:ITreeFloatOption;
 	var __firstFrame:Bool = true;
 
-	public function new(name:String, desc:String, ?prefix:String, ?objects:Array<FlxSprite>) {
+	public function new(name:String, desc:String, prefix:String = "", ?objects:Array<FlxSprite>) {
 		super();
 		this.prefix = prefix;
 		rawName = name;