diff --git a/CMakeLists.txt b/CMakeLists.txt
index 21bff98..0548c9b 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -13,14 +13,13 @@ add_compile_options(
   /D_UNICODE
 )
 
-include_directories(include)
 
 if(${CMAKE_SIZEOF_VOID_P} EQUAL 8)
   set(CMAKE_FINAL_OUTPUT_DIRECTORY ${CMAKE_SOURCE_DIR}/builds/${CMAKE_BUILD_TYPE}_x64)
-  file(GLOB LIBS x64libs/*)
+  set(LIBDIR x64libs)
 else()
   set(CMAKE_FINAL_OUTPUT_DIRECTORY ${CMAKE_SOURCE_DIR}/builds/${CMAKE_BUILD_TYPE}_x86)
-  file(GLOB LIBS x86libs/*)
+  set(LIBDIR x86libs)
 endif()
 set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY ${CMAKE_FINAL_OUTPUT_DIRECTORY})
 set(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${CMAKE_FINAL_OUTPUT_DIRECTORY})
@@ -28,8 +27,12 @@ set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_FINAL_OUTPUT_DIRECTORY})
 
 set(CMAKE_CONFIGURATION_TYPES Debug Release)
 
+file(GLOB LIBS ${LIBDIR}/*)
 file(COPY ${LIBS} DESTINATION ${CMAKE_FINAL_OUTPUT_DIRECTORY})
 
+include_directories(include)
+link_directories(${LIBDIR})
+
 add_library(text text.cpp)
 link_libraries(text)
 
diff --git a/deploy.ps1 b/deploy.ps1
index 2a2603f..9f7577b 100644
--- a/deploy.ps1
+++ b/deploy.ps1
@@ -11,11 +11,13 @@ $targets = @(
 	"Qt5Widgets.dll",
 	"LoaderDll.dll",
 	"LocaleEmulator.dll",
+	"lua53.dll",
 	"Bing Translate.dll",
 	"Copy to Clipboard.dll",
 	"Extra Newlines.dll",
 	"Extra Window.dll",
 	"Google Translate.dll",
+	"Lua.dll",
 	"Regex Filter.dll",
 	"Remove Repetition.dll",
 	"Replacer.dll",
diff --git a/extensions/CMakeLists.txt b/extensions/CMakeLists.txt
index 78cbe4e..ff166d8 100644
--- a/extensions/CMakeLists.txt
+++ b/extensions/CMakeLists.txt
@@ -9,6 +9,7 @@ add_library(Copy\ to\ Clipboard SHARED copyclipboard.cpp extensionimpl.cpp)
 add_library(Extra\ Newlines SHARED extranewlines.cpp extensionimpl.cpp)
 add_library(Extra\ Window SHARED extrawindow.cpp extensionimpl.cpp)
 add_library(Google\ Translate SHARED googletranslate.cpp extensionimpl.cpp)
+add_library(Lua SHARED lua.cpp extensionimpl.cpp)
 add_library(Regex\ Filter SHARED regexfilter.cpp extensionimpl.cpp)
 add_library(Remove\ Repetition SHARED removerepeat.cpp extensionimpl.cpp)
 add_library(Replacer SHARED replacer.cpp extensionimpl.cpp)
@@ -19,5 +20,6 @@ add_executable(Extension_Tests extensiontester.cpp)
 target_link_libraries(Bing\ Translate winhttp Qt5::Widgets)
 target_link_libraries(Extra\ Window Qt5::Widgets)
 target_link_libraries(Google\ Translate winhttp Qt5::Widgets)
+target_link_libraries(Lua lua53 Qt5::Widgets)
 target_link_libraries(Regex\ Filter Qt5::Widgets)
 target_link_libraries(Thread\ Linker Qt5::Widgets)
diff --git a/extensions/lua.cpp b/extensions/lua.cpp
new file mode 100644
index 0000000..14e6049
--- /dev/null
+++ b/extensions/lua.cpp
@@ -0,0 +1,168 @@
+#include "extension.h"
+#include "util.h"
+#include "text.h"
+#include "defs.h"
+#include <QMainWindow>
+#include <QLayout>
+#include <QPlainTextEdit>
+#include <QPushButton>
+#include <QTimer>
+
+extern "C"
+{
+	enum LuaType
+	{
+		LUA_TNONE = -1,
+		LUA_TNIL = 0,
+		LUA_TBOOLEAN = 1,
+		LUA_TLIGHTUSERDATA = 2,
+		LUA_TNUMBER = 3,
+		LUA_TSTRING = 4,
+		LUA_TTABLE = 5,
+		LUA_TFUNCTION = 6,
+		LUA_TUSERDATA = 7,
+		LUA_TTHREAD = 8
+	};
+
+	enum LuaStatus
+	{
+		LUA_OK = 0,
+		LUA_YIELD = 1,
+		LUA_ERRRUN = 2,
+		LUA_ERRSYNTAX = 3,
+		LUA_ERRMEM = 4,
+		LUA_ERRGCMM = 5,
+		LUA_ERRERR = 6
+	};
+
+	struct lua_State;
+	__declspec(dllimport) lua_State* luaL_newstate();
+	__declspec(dllimport) void luaL_openlibs(lua_State*);
+	__declspec(dllimport) void lua_close(lua_State*);
+
+	__declspec(dllimport) LuaStatus luaL_loadstring(lua_State*, const char* str);
+
+	__declspec(dllimport) LuaStatus lua_pcallk(lua_State*, int nargs, int nresults, int msgh, void*, void*);
+
+	__declspec(dllimport) const char* lua_tolstring(lua_State*, int index, size_t* size);
+	__declspec(dllimport) const char* lua_pushstring(lua_State*, const char* str);
+
+	__declspec(dllimport) void lua_pushinteger(lua_State*, int64_t n);
+
+	__declspec(dllimport) void lua_createtable(lua_State*, int narr, int nrec);
+	__declspec(dllimport) void lua_settable(lua_State*, int index);
+
+	__declspec(dllimport) void lua_settop(lua_State*, int index);
+	__declspec(dllimport) LuaType lua_getglobal(lua_State*, const char* name);
+}
+
+bool luaL_dostring(lua_State* L, const char* str)
+{
+	return luaL_loadstring(L, str) || lua_pcallk(L, 0, -1, 0, NULL, NULL);
+}
+
+bool logErrors = true;
+
+std::mutex m;
+std::string script;
+int revCount = 0;
+
+struct : QMainWindow
+{
+	void launch()
+	{
+		auto centralWidget = new QWidget(this);
+		auto layout = new QVBoxLayout(centralWidget);
+		auto scriptEditor = new QPlainTextEdit(centralWidget);
+		auto loadButton = new QPushButton("Load Script", centralWidget);
+		layout->addWidget(scriptEditor);
+		layout->addWidget(loadButton);
+		connect(loadButton, &QPushButton::clicked, [=](bool)
+		{
+			std::lock_guard l(m);
+			++revCount;
+			script = scriptEditor->toPlainText().toUtf8();
+		});
+		resize(800, 600);
+		setCentralWidget(centralWidget);
+		setWindowTitle("Lua");
+		show();
+	}
+}*window = nullptr;
+
+BOOL WINAPI DllMain(HMODULE hModule, DWORD ul_reason_for_call, LPVOID lpReserved)
+{
+	switch (ul_reason_for_call)
+	{
+	case DLL_PROCESS_ATTACH:
+	{
+		QTimer::singleShot(0, []
+		{
+			std::lock_guard l(m);
+			(window = new std::remove_pointer_t<decltype(window)>)->launch();
+		});
+	}
+	break;
+	case DLL_PROCESS_DETACH:
+	{
+		if (lpReserved == NULL) // https://blogs.msdn.microsoft.com/oldnewthing/20120105-00/?p=8683
+		{
+			std::lock_guard l(m);
+			delete window;
+			window = nullptr;
+		}
+	}
+	break;
+	}
+	return TRUE;
+}
+
+bool ProcessSentence(std::wstring& sentence, SentenceInfo sentenceInfo)
+{
+	thread_local static std::unique_ptr<lua_State, Functor<lua_close>> L_(luaL_newstate());
+	thread_local static lua_State* L = L_.get();
+	thread_local static auto _ = (luaL_openlibs(L), luaL_dostring(L, "function ProcessSentence() end"));
+	thread_local static int revCount = 0;
+
+	if (::revCount > revCount)
+	{
+		std::lock_guard l(m);
+		revCount = ::revCount;
+		luaL_dostring(L, "ProcessSentence = nil");
+		if (luaL_dostring(L, script.c_str()) != LUA_OK)
+		{
+			sentence += NEWLINE + LUA_ERROR + StringToWideString(lua_tolstring(L, -1, nullptr));
+			lua_settop(L, 0);
+			return logErrors;
+		}
+	}
+
+	if (lua_getglobal(L, "ProcessSentence") != LUA_TFUNCTION)
+	{
+		sentence += NEWLINE + LUA_ERROR + L"ProcessSentence is not a function";
+		lua_settop(L, 0);
+		return logErrors;
+	}
+	lua_pushstring(L, WideStringToString(sentence).c_str());
+	lua_createtable(L, 0, 0);
+	for (auto info = sentenceInfo.infoArray; info->name != nullptr; ++info)
+	{
+		lua_pushstring(L, info->name);
+		lua_pushinteger(L, info->value);
+		lua_settable(L, 3);
+	}
+	if (lua_pcallk(L, 2, 1, 0, NULL, NULL) != LUA_OK)
+	{
+		sentence += NEWLINE + LUA_ERROR + StringToWideString(lua_tolstring(L, -1, nullptr));
+		lua_settop(L, 0);
+		return logErrors;
+	}
+	if (const char* newSentence = lua_tolstring(L, -1, nullptr))
+	{
+		sentence = StringToWideString(newSentence);
+		lua_settop(L, 0);
+		return true;
+	}
+	lua_settop(L, 0);
+	return false;
+}
diff --git a/include/defs.h b/include/defs.h
index fc220f8..ddf719c 100644
--- a/include/defs.h
+++ b/include/defs.h
@@ -29,7 +29,7 @@ constexpr auto REPLACE_SAVE_FILE = u8"SavedReplacements.txt";
 
 // Misc
 
-constexpr auto DEFAULT_EXTENSIONS = u8"Remove Repetition>Copy to Clipboard>Google Translate>Extra Window>Extra Newlines";
+constexpr auto DEFAULT_EXTENSIONS = u8"Remove Repetition>Lua>Copy to Clipboard>Bing Translate>Extra Window>Extra Newlines";
 
 // Functions
 
diff --git a/include/text.h b/include/text.h
index 9a338e5..564c0d3 100644
--- a/include/text.h
+++ b/include/text.h
@@ -55,7 +55,7 @@ extern const char* BG_COLOR;
 extern const char* TEXT_COLOR;
 extern const char* FONT_SIZE;
 extern const char* TOPMOST;
-extern const char* ALWAYS_ON_TOP;
+extern const wchar_t* LUA_ERROR;
 extern const char* REGEX_FILTER;
 extern const char* INVALID_REGEX;
 extern const char* CURRENT_FILTER;
diff --git a/text.cpp b/text.cpp
index d779c66..7decde8 100644
--- a/text.cpp
+++ b/text.cpp
@@ -84,7 +84,7 @@ const char* BG_COLOR = u8"Background Color";
 const char* TEXT_COLOR = u8"Text Color";
 const char* FONT_SIZE = u8"Font Size";
 const char* TOPMOST = u8"Always on Top";
-const char* ALWAYS_ON_TOP = u8"Keep this window on top";
+const wchar_t* LUA_ERROR = L"Lua error: ";
 const char* REGEX_FILTER = u8"Regex Filter";
 const char* INVALID_REGEX = u8"Invalid regex";
 const char* CURRENT_FILTER = u8"Currently filtering: ";
@@ -215,7 +215,6 @@ Clic y arrastra los bordes de la ventana para moverla, o en la esquina inferior
 	TEXT_COLOR = u8"Color de texto";
 	FONT_SIZE = u8"Tamaño de letra";
 	TOPMOST = u8"Siempre visible";
-	ALWAYS_ON_TOP = u8"Matener esta ventana encima";
 	REGEX_FILTER = u8"Filtro Regex";
 	INVALID_REGEX = u8"Regex inválido";
 	CURRENT_FILTER = u8"Actualmente filtrando: ";
@@ -300,7 +299,6 @@ S/Q/V: 代码页/UTF-16/UTF-8 字符串
 	TEXT_COLOR = u8"文本颜色";
 	FONT_SIZE = u8"字体大小";
 	TOPMOST = u8"总是位于最上层";
-	ALWAYS_ON_TOP = u8"将本窗口在保持最上层";
 	REGEX_FILTER = u8"正则表达式过滤器";
 	INVALID_REGEX = u8"无效的正则表达式";
 	CURRENT_FILTER = u8"当前过滤中: ";
diff --git a/x64libs/lua53.dll b/x64libs/lua53.dll
new file mode 100644
index 0000000..a0d8de2
Binary files /dev/null and b/x64libs/lua53.dll differ
diff --git a/x64libs/lua53.lib b/x64libs/lua53.lib
new file mode 100644
index 0000000..9f2a77e
Binary files /dev/null and b/x64libs/lua53.lib differ
diff --git a/x86libs/lua53.dll b/x86libs/lua53.dll
new file mode 100644
index 0000000..7d65811
Binary files /dev/null and b/x86libs/lua53.dll differ
diff --git a/x86libs/lua53.lib b/x86libs/lua53.lib
new file mode 100644
index 0000000..508951f
Binary files /dev/null and b/x86libs/lua53.lib differ