diff --git a/res/layouts/pages/languages.xml b/res/layouts/pages/languages.xml
new file mode 100644
index 00000000..38722bed
--- /dev/null
+++ b/res/layouts/pages/languages.xml
@@ -0,0 +1,3 @@
+<panel size='400' color='#00000080' padding='8'>
+    <!-- content is generated in script -->
+</panel>
diff --git a/res/layouts/pages/languages.xml.lua b/res/layouts/pages/languages.xml.lua
new file mode 100644
index 00000000..be6c5905
--- /dev/null
+++ b/res/layouts/pages/languages.xml.lua
@@ -0,0 +1,19 @@
+function on_open()
+    local locales = gui.get_locales_info()
+    local invlocales = {}
+    local names = {}
+    for k, v in pairs(locales) do
+        table.insert(names, v.name)
+        invlocales[v.name] = k
+    end
+    table.sort(names)
+    
+    local panel = document.root
+    for _,k in ipairs(names) do
+        panel:add(string.format(
+            "<button onclick=%q padding='10'>%s</button>",
+            string.format("gui.set_locale(%q) menu:back()", invlocales[k]), k
+        ))
+    end
+    panel:add("<button padding='10' onclick='menu:back()'>@Back</button>")
+end
diff --git a/src/assets/assetload_funcs.cpp b/src/assets/assetload_funcs.cpp
index 0281e504..57679410 100644
--- a/src/assets/assetload_funcs.cpp
+++ b/src/assets/assetload_funcs.cpp
@@ -91,7 +91,7 @@ assetload::postfunc assetload::atlas(
 ) {
     AtlasBuilder builder;
     for (const auto& file : paths->listdir(directory)) {
-        if (fs::is_directory(file))
+        if (!imageio::is_read_supported(file.extension()))
             continue;
         if (!appendAtlas(builder, file))
             continue;
@@ -141,7 +141,7 @@ assetload::postfunc assetload::layout(
 ) {
     return [=](auto assets) {
         try {
-            auto cfg = dynamic_cast<LayoutCfg*>(config.get());
+            auto cfg = std::dynamic_pointer_cast<LayoutCfg>(config);
             auto document = UiDocument::read(cfg->env, name, file);
             assets->store(document.release(), name);
         } catch (const parsing_error& err) {
@@ -158,7 +158,7 @@ assetload::postfunc assetload::sound(
     const std::string name,
     std::shared_ptr<AssetCfg> config
 ) {
-    auto cfg = dynamic_cast<SoundCfg*>(config.get());
+    auto cfg = std::dynamic_pointer_cast<SoundCfg>(config);
     bool keepPCM = cfg ? cfg->keepPCM : false;
 
     std::string extension = ".ogg";
diff --git a/src/frontend/debug_panel.cpp b/src/frontend/debug_panel.cpp
index 05aa76e9..21ff03ad 100644
--- a/src/frontend/debug_panel.cpp
+++ b/src/frontend/debug_panel.cpp
@@ -78,7 +78,7 @@ std::shared_ptr<UINode> create_debug_panel(
                L" "+stream.str();
     }));
     panel->add(create_label([=](){
-        return L"seed: "+std::to_wstring(level->world->getSeed());
+        return L"seed: "+std::to_wstring(level->getWorld()->getSeed());
     }));
 
     for (int ax = 0; ax < 3; ax++) {
@@ -118,7 +118,7 @@ std::shared_ptr<UINode> create_debug_panel(
     }
     panel->add(create_label([=](){
         int hour, minute, second;
-        timeutil::from_value(level->world->daytime, hour, minute, second);
+        timeutil::from_value(level->getWorld()->daytime, hour, minute, second);
 
         std::wstring timeString = 
                      util::lfill(std::to_wstring(hour), 2, L'0') + L":" +
@@ -127,8 +127,8 @@ std::shared_ptr<UINode> create_debug_panel(
     }));
     {
         auto bar = std::make_shared<TrackBar>(0.0f, 1.0f, 1.0f, 0.005f, 8);
-        bar->setSupplier([=]() {return level->world->daytime;});
-        bar->setConsumer([=](double val) {level->world->daytime = val;});
+        bar->setSupplier([=]() {return level->getWorld()->daytime;});
+        bar->setConsumer([=](double val) {level->getWorld()->daytime = val;});
         panel->add(bar);
     }
     {
diff --git a/src/frontend/menu/menu.cpp b/src/frontend/menu/menu.cpp
index 2fd0eec0..d06c677e 100644
--- a/src/frontend/menu/menu.cpp
+++ b/src/frontend/menu/menu.cpp
@@ -168,33 +168,6 @@ void show_convert_request(
     }, L"", langs::get(L"Cancel"));
 }
 
-void create_languages_panel(Engine* engine) {
-    auto menu = engine->getGUI()->getMenu();
-    auto panel = menus::create_page(engine, "languages", 400, 0.5f, 1);
-    panel->setScrollable(true);
-
-    std::vector<std::string> locales;
-    for (auto& entry : langs::locales_info) {
-        locales.push_back(entry.first);
-    }
-    std::sort(locales.begin(), locales.end());
-    for (std::string& name : locales) {
-        auto& locale = langs::locales_info.at(name);
-        std::string& fullName = locale.name;
-
-        auto button = std::make_shared<Button>(
-            util::str2wstr_utf8(fullName), 
-            glm::vec4(10.f),
-            [=](GUI*) {
-                engine->setLanguage(name);
-                menu->back();
-            }
-        );
-        panel->add(button);
-    }
-    panel->add(guiutil::backButton(menu));
-}
-
 void menus::open_world(std::string name, Engine* engine, bool confirmConvert) {
     auto paths = engine->getPaths();
     auto folder = paths->getWorldsFolder()/fs::u8path(name);
@@ -239,7 +212,7 @@ void menus::open_world(std::string name, Engine* engine, bool confirmConvert) {
     } else {
         try {
             Level* level = World::load(folder, settings, content, packs);
-            level->world->wfile->createDirectories();
+            level->getWorld()->wfile->createDirectories();
             engine->setScreen(std::make_shared<LevelScreen>(engine, level));
         } catch (const world_load_error& error) {
             guiutil::alert(
@@ -277,7 +250,7 @@ void menus::create_menus(Engine* engine) {
     menus::generatorID = WorldGenerators::getDefaultGeneratorID();
     create_new_world_panel(engine);
     create_settings_panel(engine);
-    create_languages_panel(engine);
+    add_page_loader(engine, "languages");
     create_world_generators_panel(engine);
     add_page_loader(engine, "main");
     load_page(engine, "404");
diff --git a/src/frontend/screens.cpp b/src/frontend/screens.cpp
index f8a62b53..61f11ef0 100644
--- a/src/frontend/screens.cpp
+++ b/src/frontend/screens.cpp
@@ -174,7 +174,7 @@ void LevelScreen::update(float delta) {
     }
 
     if (!hud->isPause()) {
-        controller->getLevel()->world->updateTimers(delta);
+        controller->getLevel()->getWorld()->updateTimers(delta);
         animator->update(delta);
     }
     controller->update(delta, !inputLocked, hud->isPause());
diff --git a/src/graphics/render/WorldRenderer.cpp b/src/graphics/render/WorldRenderer.cpp
index a62e80a1..8431bb6a 100644
--- a/src/graphics/render/WorldRenderer.cpp
+++ b/src/graphics/render/WorldRenderer.cpp
@@ -159,7 +159,7 @@ void WorldRenderer::renderLevel(
     shader->uniform1f("u_gamma", settings.graphics.gamma);
     shader->uniform1f("u_fogFactor", fogFactor);
     shader->uniform1f("u_fogCurve", settings.graphics.fogCurve);
-    shader->uniform1f("u_dayTime", level->world->daytime);
+    shader->uniform1f("u_dayTime", level->getWorld()->daytime);
     shader->uniform3f("u_cameraPos", camera->position);
     shader->uniform1i("u_cubemap", 1);
 
@@ -267,7 +267,7 @@ void WorldRenderer::renderDebugLines(
 
 void WorldRenderer::draw(const GfxContext& pctx, Camera* camera, bool hudVisible){
     EngineSettings& settings = engine->getSettings();
-    skybox->refresh(pctx, level->world->daytime, 1.0f+fog*2.0f, 4);
+    skybox->refresh(pctx, level->getWorld()->daytime, 1.0f+fog*2.0f, 4);
 
     Assets* assets = engine->getAssets();
     Shader* linesShader = assets->getShader("lines");
@@ -303,7 +303,7 @@ void WorldRenderer::draw(const GfxContext& pctx, Camera* camera, bool hudVisible
     auto screenShader = assets->getShader("screen");
     screenShader->use();
     screenShader->uniform1f("u_timer", Window::time());
-    screenShader->uniform1f("u_dayTime", level->world->daytime);
+    screenShader->uniform1f("u_dayTime", level->getWorld()->daytime);
     postProcessing->render(pctx, screenShader);
 }
 
diff --git a/src/logic/ChunksController.cpp b/src/logic/ChunksController.cpp
index 056e65d1..f32bc6b5 100644
--- a/src/logic/ChunksController.cpp
+++ b/src/logic/ChunksController.cpp
@@ -118,7 +118,7 @@ void ChunksController::createChunk(int x, int z) {
 	if (!chunk->isLoaded()) {
 		generator->generate(
             chunk->voxels, x, z, 
-            level->world->getSeed()
+            level->getWorld()->getSeed()
         );
 		chunk->setUnsaved(true);
 	}
diff --git a/src/logic/scripting/lua/libgui.cpp b/src/logic/scripting/lua/libgui.cpp
index 453f370e..65babefb 100644
--- a/src/logic/scripting/lua/libgui.cpp
+++ b/src/logic/scripting/lua/libgui.cpp
@@ -362,6 +362,32 @@ static int l_gui_reindex(lua_State* L) {
     return 0;
 }
 
+/// @brief gui.get_locales_info() -> table of tables 
+static int l_gui_get_locales_info(lua_State* L) {
+    auto& locales = langs::locales_info;
+    lua_createtable(L, 0, locales.size());
+    for (auto& entry : locales) {
+        lua_createtable(L, 0, 1);
+        lua_pushstring(L, entry.second.name.c_str());
+        lua_setfield(L, -2, "name");
+        lua_setfield(L, -2, entry.first.c_str());
+    }
+    return 1;
+}
+
+/// @brief gui.get_locale() -> string 
+static int l_gui_get_locale(lua_State* L) {
+    lua_pushstring(L, langs::current->getId().c_str());
+    return 1;
+}
+
+/// @brief gui.set_locale(locale: string) -> nil
+static int l_gui_set_locale(lua_State* L) {
+    auto locale = lua_tostring(L, 1);
+    scripting::engine->setLanguage(locale);
+    return 0;
+}
+
 const luaL_Reg guilib [] = {
     {"get_viewport", lua_wrap_errors<l_gui_getviewport>},
     {"getattr", lua_wrap_errors<l_gui_getattr>},
@@ -369,5 +395,8 @@ const luaL_Reg guilib [] = {
     {"get_env", lua_wrap_errors<l_gui_get_env>},
     {"str", lua_wrap_errors<l_gui_str>},
     {"reindex", lua_wrap_errors<l_gui_reindex>},
+    {"get_locale", lua_wrap_errors<l_gui_get_locale>},
+    {"set_locale", lua_wrap_errors<l_gui_set_locale>},
+    {"get_locales_info", lua_wrap_errors<l_gui_get_locales_info>},
     {NULL, NULL}
 };
diff --git a/src/logic/scripting/lua/libworld.cpp b/src/logic/scripting/lua/libworld.cpp
index aea29404..ccd31120 100644
--- a/src/logic/scripting/lua/libworld.cpp
+++ b/src/logic/scripting/lua/libworld.cpp
@@ -7,23 +7,23 @@
 #include <cmath>
 
 static int l_world_get_total_time(lua_State* L) {
-    lua_pushnumber(L, scripting::level->world->totalTime);
+    lua_pushnumber(L, scripting::level->getWorld()->totalTime);
     return 1;
 }
 
 static int l_world_get_day_time(lua_State* L) {
-    lua_pushnumber(L, scripting::level->world->daytime);
+    lua_pushnumber(L, scripting::level->getWorld()->daytime);
     return 1;
 }
 
 static int l_world_set_day_time(lua_State* L) {
     double value = lua_tonumber(L, 1);
-    scripting::level->world->daytime = fmod(value, 1.0);
+    scripting::level->getWorld()->daytime = fmod(value, 1.0);
     return 0;
 }
 
 static int l_world_get_seed(lua_State* L) {
-    lua_pushinteger(L, scripting::level->world->getSeed());
+    lua_pushinteger(L, scripting::level->getWorld()->getSeed());
     return 1;
 }
 
diff --git a/src/maths/UVRegion.h b/src/maths/UVRegion.h
index a0860a66..9ef0bd79 100644
--- a/src/maths/UVRegion.h
+++ b/src/maths/UVRegion.h
@@ -1,8 +1,7 @@
 #ifndef MATHS_UVREGION_H_
 #define MATHS_UVREGION_H_
 
-class UVRegion {
-public:
+struct UVRegion {
 	float u1;
 	float v1;
 	float u2;
diff --git a/src/world/Level.h b/src/world/Level.h
index e1bf755d..24b7e804 100644
--- a/src/world/Level.h
+++ b/src/world/Level.h
@@ -24,8 +24,8 @@ class ChunksStorage;
 
 /// @brief A level, contains chunks and objects
 class Level {
-public:
     std::unique_ptr<World> world;
+public:
     const Content* const content;
     std::vector<std::shared_ptr<Object>> objects;
     std::unique_ptr<Chunks> chunks;