diff --git a/src/init.lua b/src/init.lua
index a7a5347..a746eff 100644
--- a/src/init.lua
+++ b/src/init.lua
@@ -14,11 +14,12 @@ local store = require "store"
 local class = require "class"
 local mount = require "mount"
 local signal = require "signal"
--- local lang = require "lang"
+local lang = require "lang"
 
 -- submodule
 local _,advancedTween = pcall(require,"libs.AdvancedTween")
 local _,round = pcall(require,"libs.round")
+local _,customWarn = pcall(require,"libs.customWarn")
 
 local idSpace = {}
 
@@ -38,10 +39,7 @@ function module.Init(id)
 	local this = {__type = "quad_module_init"}
 
 	this.require = require
-	this.warn = function(err)
-		warn(tostring(err))
-		print(debug.traceback())
-	end
+	this.warn = customWarn or warn
 	this.Round = type(round) == "table" and round ---@type quad_module_round
 	this.Tween = type(advancedTween) == "table" and advancedTween ---@type quad_module_tween
 	this.Signal = signal.init(this) ---@type quad_module_signal
@@ -50,6 +48,7 @@ function module.Init(id)
 	this.Store = store.init(this) ---@type quad_module_store
 	this.Mount = mount.init(this) ---@type quad_module_mount
 	this.Class = class.init(this) ---@type quad_module_class
+	this.Lang = lang.init(this) ---@type quad_module_lang
 
 	-- save
 	if id then
diff --git a/src/lang.lua b/src/lang.lua
new file mode 100644
index 0000000..50a3274
--- /dev/null
+++ b/src/lang.lua
@@ -0,0 +1,11 @@
+local module = {}
+
+function module.init(shared)
+    ---@class quad_module_lang
+    local new = {}
+
+    return new
+end
+
+return module
+
diff --git a/src/libs/customWarn.lua b/src/libs/customWarn.lua
new file mode 100644
index 0000000..8b0c7cd
--- /dev/null
+++ b/src/libs/customWarn.lua
@@ -0,0 +1,4 @@
+return function(err)
+	warn(tostring(err))
+	print(debug.traceback())
+end
diff --git a/src/style.lua b/src/style.lua
index f1e2e7c..e633e63 100644
--- a/src/style.lua
+++ b/src/style.lua
@@ -1,74 +1,74 @@
-local module = {};
-local insert = table.insert;
+local module = {}
+local insert = table.insert
 
 ---@param shared quad_export
 ---@return quad_module_style
 function module.init(shared)
-	local warn = shared.warn;
+	local warn = shared.warn
 	---@class quad_module_style
-	local new = {__type = "quad_module_style"};
+	local new = {__type = "quad_module_style"}
 
-	local styles = {};
-	new.Styles = styles;
+	local styles = {}
+	new.Styles = styles
 
 	---@class quad_style
-	local styleClass = {__type = "quad_style"};
-	styleClass.__index = styleClass;
+	local styleClass = {__type = "quad_style"}
+	styleClass.__index = styleClass
 
 	function new.New(props)
-		return setmetatable(props,styleClass);
+		return setmetatable(props,styleClass)
 	end
-	local newStyle = new.New;
+	local newStyle = new.New
 
 	setmetatable(new,{
 		---@return quad_style
 		__call = function (_,styleTable)
 			if type(styleTable) == "string" then
 				return function (nstyleTable)
-					local this = newStyle(nstyleTable);
-					styles[styleTable] = this;
-					return this;
+					local this = newStyle(nstyleTable)
+					styles[styleTable] = this
+					return this
 				end
 			end
-			return newStyle(styleTable);
+			return newStyle(styleTable)
 		end
-	});
+	})
 
 	local function recursionStyleParse(style,parseTable)
 		for _,value in ipairs(parseTable) do
 			if value == style then
-				warn("[Quad] infinity recursion detected on parsing style. ignored recursion");
-				return;
+				warn("[Quad] infinity recursion detected on parsing style. ignored recursion")
+				return
 			end
 		end
-		insert(parseTable,style);
+		insert(parseTable,style)
 		for key,value in pairs(style) do
 			if type(key) == "number" and type(value) == "table" and value.__type == "quad_style" then
-				recursionStyleParse(value,parseTable);
+				recursionStyleParse(value,parseTable)
 			end
 		end
 	end
 
-	local parsed = {};
+	local parsed = {}
 	function new.ParseStyles(style)
 		do -- check cache
-			local cached = parsed[style];
-			if cached then return cached; end
+			local cached = parsed[style]
+			if cached then return cached end
 		end
 
 		-- type check
 		if type(style) ~= "table" or style.__type ~= "quad_style" then
-			error(("Unknown type type '%s:%s' got"):format(tostring(style),tostring(type(style))));
+			error(("Unknown type type '%s:%s' got"):format(tostring(style),tostring(type(style))))
 		end
 
 		local this = {}
-		recursionStyleParse(style,this);
+		recursionStyleParse(style,this)
 
-		parsed[style] = this;
-		return this;
+		parsed[style] = this
+		return this
 	end
 
-	return new;
+	return new
 end
 
-return module;
+return module
diff --git a/src/types.lua b/src/types.lua
index aedae9c..76df3c3 100644
--- a/src/types.lua
+++ b/src/types.lua
@@ -175,27 +175,32 @@ export type module_tween = {
 }
 
 -------------------
--- module_signal
+-- module_round
 -------------------
-export type round = {
+export type module_round = {
 	SetRound: (ImageFrame:ImageLabel|ImageButton,RoundSize:number)->(ImageLabel|ImageButton);
 	SetOutline: (ImageFrame:ImageLabel|ImageButton,RoundSize:number)->(ImageLabel|ImageButton);
 	GetRound: (ImageFrame:ImageLabel|ImageButton)->number;
 	GetOutline: (ImageFrame:ImageLabel|ImageButton)->number;
 }
 
+-------------------
+-- module_signal
+-------------------
+export type module_lang = {}
+
 -------------------
 -- module
 -------------------
 export type module_exported = {
-	Round: round;
+	Signal: module_signal;
+	Round: module_round;
 	Tween: module_tween;
 	Style: module_style;
 	Event: module_event;
 	Store: module_store;
 	Mount: module_mount;
 	Class: module_class;
-	Signal: module_signal;
 	Lang: module_lang;
 }
 export type module = {