diff --git a/src/EterLocale/StringCodec.cpp b/src/EterLocale/StringCodec.cpp
deleted file mode 100644
index a16724d..0000000
--- a/src/EterLocale/StringCodec.cpp
+++ /dev/null
@@ -1,43 +0,0 @@
-#include "stdafx.h"
-#include "StringCodec.h"
-#include "StringCodec_Vietnamese.h"
-
-int Ymir_WideCharToMultiByte(
-  UINT CodePage, 
-  DWORD dwFlags, 
-  LPCWSTR lpWideCharStr, 
-  int cchWideChar, 
-  LPSTR lpMultiByteStr, 
-  int cbMultiByte, 
-  LPCSTR lpDefaultChar, 
-  LPBOOL lpUsedDefaultChar 
-)
-{
-	if (CodePage == CP_1258)
-	{
-		return EL_String_Encode_Vietnamese(lpWideCharStr, cchWideChar, lpMultiByteStr, cbMultiByte);
-	}
-	else
-	{
-		return WideCharToMultiByte(CodePage, dwFlags, lpWideCharStr, cchWideChar, lpMultiByteStr, cbMultiByte, lpDefaultChar, lpUsedDefaultChar);
-	}
-}
-
-int Ymir_MultiByteToWideChar(
-  UINT CodePage, 
-  DWORD dwFlags, 
-  LPCSTR lpMultiByteStr, 
-  int cbMultiByte, 
-  LPWSTR lpWideCharStr, 
-  int cchWideChar 
-)
-{
-	if (CodePage == CP_1258)
-	{
-		return EL_String_Decode_Vietnamese(lpMultiByteStr, cbMultiByte, lpWideCharStr, cchWideChar);
-	}
-	else
-	{
-		return MultiByteToWideChar(CodePage, dwFlags, lpMultiByteStr, cbMultiByte, lpWideCharStr, cchWideChar);
-	}
-}
\ No newline at end of file
diff --git a/src/EterLocale/StringCodec.h b/src/EterLocale/StringCodec.h
deleted file mode 100644
index a937f57..0000000
--- a/src/EterLocale/StringCodec.h
+++ /dev/null
@@ -1,21 +0,0 @@
-#pragma once
-
-int Ymir_WideCharToMultiByte(
-  UINT CodePage, 
-  DWORD dwFlags, 
-  LPCWSTR lpWideCharStr, 
-  int cchWideChar, 
-  LPSTR lpMultiByteStr, 
-  int cbMultiByte, 
-  LPCSTR lpDefaultChar, 
-  LPBOOL lpUsedDefaultChar 
-);
-
-int Ymir_MultiByteToWideChar(
-  UINT CodePage, 
-  DWORD dwFlags, 
-  LPCSTR lpMultiByteStr, 
-  int cbMultiByte, 
-  LPWSTR lpWideCharStr, 
-  int cchWideChar 
-);
\ No newline at end of file
diff --git a/src/EterLocale/StringCodec_Vietnamese.cpp b/src/EterLocale/StringCodec_Vietnamese.cpp
deleted file mode 100644
index eab8978..0000000
--- a/src/EterLocale/StringCodec_Vietnamese.cpp
+++ /dev/null
@@ -1,554 +0,0 @@
-#include "stdafx.h"
-#include "StringCodec_Vietnamese.h"
-
-#pragma warning(disable: 4310) // char 짤림 경고 무시
-
-static wchar_t cp1258_to_unicode[256] = {
-	0x0000, 0x0001, 0x0002, 0x0003, 0x0004, 0x0005, 0x0006, 0x0007, 
-	0x0008, 0x0009, 0x000a, 0x000b, 0x000c, 0x000d, 0x000e, 0x000f, 
-	0x0010, 0x0011, 0x0012, 0x0013, 0x0014, 0x0015, 0x0016, 0x0017, 
-	0x0018, 0x0019, 0x001a, 0x001b, 0x001c, 0x001d, 0x001e, 0x001f, 
-	0x0020, 0x0021, 0x0022, 0x0023, 0x0024, 0x0025, 0x0026, 0x0027, 
-	0x0028, 0x0029, 0x002a, 0x002b, 0x002c, 0x002d, 0x002e, 0x002f, 
-	0x0030, 0x0031, 0x0032, 0x0033, 0x0034, 0x0035, 0x0036, 0x0037, 
-	0x0038, 0x0039, 0x003a, 0x003b, 0x003c, 0x003d, 0x003e, 0x003f, 
-	0x0040, 0x0041, 0x0042, 0x0043, 0x0044, 0x0045, 0x0046, 0x0047, 
-	0x0048, 0x0049, 0x004a, 0x004b, 0x004c, 0x004d, 0x004e, 0x004f, 
-	0x0050, 0x0051, 0x0052, 0x0053, 0x0054, 0x0055, 0x0056, 0x0057, 
-	0x0058, 0x0059, 0x005a, 0x005b, 0x005c, 0x005d, 0x005e, 0x005f, 
-	0x0060, 0x0061, 0x0062, 0x0063, 0x0064, 0x0065, 0x0066, 0x0067, 
-	0x0068, 0x0069, 0x006a, 0x006b, 0x006c, 0x006d, 0x006e, 0x006f, 
-	0x0070, 0x0071, 0x0072, 0x0073, 0x0074, 0x0075, 0x0076, 0x0077, 
-	0x0078, 0x0079, 0x007a, 0x007b, 0x007c, 0x007d, 0x007e, 0x007f, 
-	0x20ac, 0x0081, 0x201a, 0x0192, 0x201e, 0x2026, 0x2020, 0x2021, //0x80
-	0x02c6, 0x2030, 0x008a, 0x2039, 0x0152, 0x008d, 0x008e, 0x008f, //
-	0x0090, 0x2018, 0x2019, 0x201c, 0x201d, 0x2022, 0x2013, 0x2014, //0x90 
-	0x02dc, 0x2122, 0x009a, 0x203a, 0x0153, 0x009d, 0x009e, 0x0178, //
-	0x00a0, 0x00a1, 0x00a2, 0x00a3, 0x00a4, 0x00a5, 0x00a6, 0x00a7, //0xa0
-	0x00a8, 0x00a9, 0x00aa, 0x00ab, 0x00ac, 0x00ad, 0x00ae, 0x00af, //
-	0x00b0, 0x00b1, 0x00b2, 0x00b3, 0x00b4, 0x00b5, 0x00b6, 0x00b7, //0xb0
-	0x00b8, 0x00b9, 0x00ba, 0x00bb, 0x00bc, 0x00bd, 0x00be, 0x00bf, //
-	0x00c0, 0x00c1, 0x00c2, 0x0102, 0x00c4, 0x00c5, 0x00c6, 0x00c7, //0xc0
-	0x00c8, 0x00c9, 0x00ca, 0x00cb, 0x0300, 0x00cd, 0x00ce, 0x00cf, //
-	0x0110, 0x00d1, 0x0309, 0x00d3, 0x00d4, 0x01a0, 0x00d6, 0x00d7, //0xd0
-	0x00d8, 0x00d9, 0x00da, 0x00db, 0x00dc, 0x01af, 0x0303, 0x00df, //
-	0x00e0, 0x00e1, 0x00e2, 0x0103, 0x00e4, 0x00e5, 0x00e6, 0x00e7, //0xe0
-	0x00e8, 0x00e9, 0x00ea, 0x00eb, 0x0301, 0x00ed, 0x00ee, 0x00ef, //
-	0x0111, 0x00f1, 0x0323, 0x00f3, 0x00f4, 0x01a1, 0x00f6, 0x00f7, //0xf0
-	0x00f8, 0x00f9, 0x00fa, 0x00fb, 0x00fc, 0x01b0, 0x20ab, 0x00ff, //
-};
-
-static wchar_t cp1258_composed_table[][5] = {
-	{ 0x00c1, 0x00c0, 0x1ea2, 0x00c3, 0x1ea0 },
-	{ 0x00e1, 0x00e0, 0x1ea3, 0x00e3, 0x1ea1 },
-	{ 0x1eae, 0x1eb0, 0x1eb2, 0x1eb4, 0x1eb6 },
-	{ 0x1eaf, 0x1eb1, 0x1eb3, 0x1eb5, 0x1eb7 },
-	{ 0x1ea4, 0x1ea6, 0x1ea8, 0x1eaa, 0x1eac },
-	{ 0x1ea5, 0x1ea7, 0x1ea9, 0x1eab, 0x1ead },
-	{ 0x00c9, 0x00c8, 0x1eba, 0x1ebc, 0x1eb8 },
-	{ 0x00e9, 0x00e8, 0x1ebb, 0x1ebd, 0x1eb9 },
-	{ 0x1ebe, 0x1ec0, 0x1ec2, 0x1ec4, 0x1ec6 },
-	{ 0x1ebf, 0x1ec1, 0x1ec3, 0x1ec5, 0x1ec7 },
-	{ 0x00cd, 0x00cc, 0x1ec8, 0x0128, 0x1eca },
-	{ 0x00ed, 0x00ec, 0x1ec9, 0x0129, 0x1ecb },
-	{ 0x00d3, 0x00d2, 0x1ece, 0x00d5, 0x1ecc },
-	{ 0x00f3, 0x00f2, 0x1ecf, 0x00f5, 0x1ecd },
-	{ 0x1ed0, 0x1ed2, 0x1ed4, 0x1ed6, 0x1ed8 },
-	{ 0x1ed1, 0x1ed3, 0x1ed5, 0x1ed7, 0x1ed9 },
-	{ 0x1eda, 0x1edc, 0x1ede, 0x1ee0, 0x1ee2 },
-	{ 0x1edb, 0x1edd, 0x1edf, 0x1ee1, 0x1ee3 },
-	{ 0x00da, 0x00d9, 0x1ee6, 0x0168, 0x1ee4 },
-	{ 0x00fa, 0x00f9, 0x1ee7, 0x0169, 0x1ee5 },
-	{ 0x1ee8, 0x1eea, 0x1eec, 0x1eee, 0x1ef0 },
-	{ 0x1ee9, 0x1eeb, 0x1eed, 0x1eef, 0x1ef1 },
-	{ 0x00dd, 0x1ef2, 0x1ef6, 0x1ef8, 0x1ef4 },
-	{ 0x00fd, 0x1ef3, 0x1ef7, 0x1ef9, 0x1ef5 },
-};
-
-static bool IsTone(wchar_t tone)
-{
-	switch(tone)
-	{
-	case 0x0300:
-	case 0x0301:
-	case 0x0309:
-	case 0x0303:
-	case 0x0323:
-		return true;
-	default:
-		return false;
-	}
-}
-
-static wchar_t ComposeTone(wchar_t prev, wchar_t tone)
-{
-	int col, row;
-
-	switch(tone)
-	{
-	case 0x0301:	col = 0;	break;
-	case 0x0300:	col = 1;	break;
-	case 0x0309:	col = 2;	break;
-	case 0x0303:	col = 3;	break;
-	case 0x0323:	col = 4;	break;
-	default:
-		return prev;
-	}
-
-	switch(prev)
-	{
-	case 0x0041:	row = 0;	break;
-	case 0x0061:	row = 1;	break;
-	case 0x0102:	row = 2;	break;
-	case 0x0103:	row = 3;	break;
-	case 0x00C2:	row = 4;	break;
-	case 0x00E2:	row = 5;	break;
-	case 0x0045:	row = 6;	break;
-	case 0x0065:	row = 7;	break;
-	case 0x00CA:	row = 8;	break;
-	case 0x00EA:	row = 9;	break;
-	case 0x0049:	row = 10;	break;
-	case 0x0069:	row = 11;	break;
-	case 0x004F:	row = 12;	break;
-	case 0x006F:	row = 13;	break;
-	case 0x00D4:	row = 14;	break;
-	case 0x00F4:	row = 15;	break;
-	case 0x01A0:	row = 16;	break;
-	case 0x01A1:	row = 17;	break;
-	case 0x0055:	row = 18;	break;
-	case 0x0075:	row = 19;	break;
-	case 0x01AF:	row = 20;	break;
-	case 0x01B0:	row = 21;	break;
-	case 0x0059:	row = 22;	break;
-	case 0x0079:	row = 23;	break;
-	default:
-		return prev;
-	}
-
-	return cp1258_composed_table[row][col];
-}
-
-int EL_String_Decode_Vietnamese(const char* multi, int multiLen, wchar_t* wide, int wideLen)
-{
-	if(multiLen < 0)
-		multiLen = (int)strlen(multi) + 1;
-
-	int src = 0;
-	int dest = 0;
-
-	if(multiLen > 0)
-	{
-		/* 첫글자는 무조건 변경 */ 
-		wchar_t prev = cp1258_to_unicode[(BYTE)multi[src++]];
-
-		while(src < multiLen)
-		{
-			wchar_t unicode = cp1258_to_unicode[(BYTE)multi[src]];
-
-			/* 다음 문자가 Tone 인가? */ 
-			if(IsTone(unicode))
-			{
-				/* 앞의 문자와 합하자. */ 
-				prev = ComposeTone(prev, unicode);
-			}
-			else
-			{
-				/* 일반 문자가 왔다. 앞 문자를 변환 */ 
-				if(dest < wideLen)
-					wide[dest++] = prev;
-				prev = unicode;
-			}
-			++src;
-		}
-
-		if(dest < wideLen)
-			wide[dest++] = prev;
-	}
-
-	return dest;
-}
-
-static bool DecomposeLetter(wchar_t input, char* letter)
-{
-	switch(input)
-	{
-	case 0x00c1:  // L'Á'
-	case 0x00c0:  // L'À'
-	case 0x1ea2:  // L'Ả'
-	case 0x00c3:  // L'Ã'
-	case 0x1ea0:  // L'Ạ'
-		*letter = 'A';
-		return true;
-	case 0x00e1:  // L'á'
-	case 0x00e0:  // L'à'
-	case 0x1ea3:  // L'ả'
-	case 0x00e3:  // L'ã'
-	case 0x1ea1:  // L'ạ'
-		*letter = 'a';
-		return true;
-	case 0x1eae:  // L'Ắ'
-	case 0x1eb0:  // L'Ằ'
-	case 0x1eb2:  // L'Ẳ'
-	case 0x1eb4:  // L'Ẵ'
-	case 0x1eb6:  // L'Ặ'
-		*letter = (char)0xc3;
-		return true;
-	case 0x1eaf:  // L'ắ'
-	case 0x1eb1:  // L'ằ'
-	case 0x1eb3:  // L'ẳ'
-	case 0x1eb5:  // L'ẵ'
-	case 0x1eb7:  // L'ặ'
-		*letter = (char)0xe3;
-		return true;
-	case 0x1ea4:  // L'Ấ'
-	case 0x1ea6:  // L'Ầ'
-	case 0x1ea8:  // L'Ẩ'
-	case 0x1eaa:  // L'Ẫ'
-	case 0x1eac:  // L'Ậ'
-		*letter = (char)0xc2;
-		return true;
-	case 0x1ea5:  // L'ấ'
-	case 0x1ea7:  // L'ầ'
-	case 0x1ea9:  // L'ẩ'
-	case 0x1eab:  // L'ẫ'
-	case 0x1ead:  // L'ậ'
-		*letter = (char)0xe2;
-		return true;
-	case 0x00c9:  // L'É'
-	case 0x00c8:  // L'È'
-	case 0x1eba:  // L'Ẻ'
-	case 0x1ebc:  // L'Ẽ'
-	case 0x1eb8:  // L'Ẹ'
-		*letter = (char)'E';
-		return true;
-	case 0x00e9:  // L'é'
-	case 0x00e8:  // L'è'
-	case 0x1ebb:  // L'ẻ'
-	case 0x1ebd:  // L'ẽ'
-	case 0x1eb9:  // L'ẹ'
-		*letter = (char)'e';
-		return true;
-	case 0x1ebe:  // L'Ế'
-	case 0x1ec0:  // L'Ề'
-	case 0x1ec2:  // L'Ể'
-	case 0x1ec4:  // L'Ễ'
-	case 0x1ec6:  // L'Ệ'
-		*letter = (char)0xca;
-		return true;
-	case 0x1ebf:  // L'ế'
-	case 0x1ec1:  // L'ề'
-	case 0x1ec3:  // L'ể'
-	case 0x1ec5:  // L'ễ'
-	case 0x1ec7:  // L'ệ'
-		*letter = (char)0xea;
-		return true;
-	case 0x00cd:  // L'Í'
-	case 0x00cc:  // L'Ì'
-	case 0x1ec8:  // L'Ỉ'
-	case 0x0128:  // L'Ĩ'
-	case 0x1eca:  // L'Ị'
-		*letter = (char)'I';
-		return true;
-	case 0x00ed:  // L'í'
-	case 0x00ec:  // L'ì'
-	case 0x1ec9:  // L'ỉ'
-	case 0x0129:  // L'ĩ'
-	case 0x1ecb:  // L'ị'
-		*letter = (char)'i';
-		return true;
-	case 0x00d3:  // L'Ó'
-	case 0x00d2:  // L'Ò'
-	case 0x1ece:  // L'Ỏ'
-	case 0x00d5:  // L'Õ'
-	case 0x1ecc:  // L'Ọ'
-		*letter = (char)'O';
-		return true;
-	case 0x00f3:  // L'ó'
-	case 0x00f2:  // L'ò'
-	case 0x1ecf:  // L'ỏ'
-	case 0x00f5:  // L'õ'
-	case 0x1ecd:  // L'ọ'
-		*letter = (char)'o';
-		return true;
-	case 0x1ed0:  // L'Ố'
-	case 0x1ed2:  // L'Ồ'
-	case 0x1ed4:  // L'Ổ'
-	case 0x1ed6:  // L'Ỗ'
-	case 0x1ed8:  // L'Ộ'
-		*letter = (char)0xd4;
-		return true;
-	case 0x1ed1:  // L'ố'
-	case 0x1ed3:  // L'ồ'
-	case 0x1ed5:  // L'ổ'
-	case 0x1ed7:  // L'ỗ'
-	case 0x1ed9:  // L'ộ'
-		*letter = (char)0xf4;
-		return true;
-	case 0x1eda:  // L'Ớ'
-	case 0x1edc:  // L'Ờ'
-	case 0x1ede:  // L'Ở'
-	case 0x1ee0:  // L'Ỡ'
-	case 0x1ee2:  // L'Ợ'
-		*letter = (char)0xd5;
-		return true;
-	case 0x1edb:  // L'ớ'
-	case 0x1edd:  // L'ờ'
-	case 0x1edf:  // L'ở'
-	case 0x1ee1:  // L'ỡ'
-	case 0x1ee3:  // L'ợ'
-		*letter = (char)0xf5;
-		return true;
-	case 0x00da:  // L'Ú'
-	case 0x00d9:  // L'Ù'
-	case 0x1ee6:  // L'Ủ'
-	case 0x0168:  // L'Ũ'
-	case 0x1ee4:  // L'Ụ'
-		*letter = (char)'U';
-		return true;
-	case 0x00fa:  // L'ú'
-	case 0x00f9:  // L'ù'
-	case 0x1ee7:  // L'ủ'
-	case 0x0169:  // L'ũ'
-	case 0x1ee5:  // L'ụ'
-		*letter = (char)'u';
-		return true;
-	case 0x1ee8:  // L'Ứ'
-	case 0x1eea:  // L'Ừ'
-	case 0x1eec:  // L'Ử'
-	case 0x1eee:  // L'Ữ'
-	case 0x1ef0:  // L'Ự'
-		*letter = (char)0xdd;
-		return true;
-	case 0x1ee9:  // L'ứ'
-	case 0x1eeb:  // L'ừ'
-	case 0x1eed:  // L'ử'
-	case 0x1eef:  // L'ữ'
-	case 0x1ef1:  // L'ự'
-		*letter = (char)0xfd;
-		return true;
-	case 0x1ef2:  // L'Ỳ'
-	case 0x00dd:  // L'Ý'
-	case 0x1ef6:  // L'Ỷ'
-	case 0x1ef8:  // L'Ỹ'
-	case 0x1ef4:  // L'Ỵ'
-		*letter = (char)'Y';
-		return true;
-	case 0x1ef3:  // L'ỳ'
-	case 0x00fd:  // L'ý'
-	case 0x1ef7:  // L'ỷ'
-	case 0x1ef9:  // L'ỹ'
-	case 0x1ef5:  // L'ỵ'
-		*letter = (char)'y';
-		return true;
-	case 0x0102: // L'Ă'
-		*letter = (char)0xc3;
-		return true;
-	case 0x0103: // L'ă'
-		*letter = (char)0xe3;
-		return true;
-	case 0x0110: // L'Đ'
-		*letter = (char)0xd0;
-		return true;
-	case 0x0111: // L'đ'
-		*letter = (char)0xf0;
-		return true;
-	case 0x01a0: // L'Ơ'
-		*letter = (char)0xd5;
-		return true;
-	case 0x01a1: // L'ơ'
-		*letter = (char)0xf5;
-		return true;
-	case 0x01af: // L'Ư'
-		*letter = (char)0xdd;
-		return true;
-	case 0x01b0: // L'ư'
-		*letter = (char)0xfd;
-		return true;
-	case 0x20ab: // L'₫'
-		*letter = (char)0xfe;
-		return true;
-	case 0x201c: // L'“'
-		*letter = (char)'"';
-		return true;
-	case 0x201d: // L'”'
-		*letter = (char)'"';
-		return true;
-	}
-
-	if(input < 256)
-	{
-		*letter = (char)input;
-		return true;
-	}
-    return false;
-}
-
-static bool DecomposeTone(wchar_t input, char* tone)
-{
-	switch(input)
-	{
-	case 0x00c1: // L'Á'
-	case 0x00e1: // L'á'
-	case 0x1eae: // L'Ắ'
-	case 0x1eaf: // L'ắ'
-	case 0x1ea4: // L'Ấ'
-	case 0x1ea5: // L'ấ'
-	case 0x00c9: // L'É'
-	case 0x00e9: // L'é'
-	case 0x1ebe: // L'Ế'
-	case 0x1ebf: // L'ế'
-	case 0x00cd: // L'Í'
-	case 0x00ed: // L'í'
-	case 0x00d3: // L'Ó'
-	case 0x00f3: // L'ó'
-	case 0x1ed0: // L'Ố'
-	case 0x1ed1: // L'ố'
-	case 0x1eda: // L'Ớ'
-	case 0x1edb: // L'ớ'
-	case 0x00da: // L'Ú'
-	case 0x00fa: // L'ú'
-	case 0x1ee8: // L'Ứ'
-	case 0x1ee9: // L'ứ'
-	case 0x00dd: // L'Ý'
-	case 0x00fd: // L'ý'
-		*tone = (char)0xec;
-		return true;
-	case 0x00c0: // L'À'
-	case 0x00e0: // L'à'
-	case 0x1eb0: // L'Ằ'
-	case 0x1eb1: // L'ằ'
-	case 0x1ea6: // L'Ầ'
-	case 0x1ea7: // L'ầ'
-	case 0x00c8: // L'È'
-	case 0x00e8: // L'è'
-	case 0x1ec0: // L'Ề'
-	case 0x1ec1: // L'ề'
-	case 0x00cc: // L'Ì'
-	case 0x00ec: // L'ì'
-	case 0x00d2: // L'Ò'
-	case 0x00f2: // L'ò'
-	case 0x1ed2: // L'Ồ'
-	case 0x1ed3: // L'ồ'
-	case 0x1edc: // L'Ờ'
-	case 0x1edd: // L'ờ'
-	case 0x00d9: // L'Ù'
-	case 0x00f9: // L'ù'
-	case 0x1eea: // L'Ừ'
-	case 0x1eeb: // L'ừ'
-	case 0x1ef2: // L'Ỳ'
-	case 0x1ef3: // L'ỳ'
-		*tone = (char)0xcc;
-		return true;
-	case 0x1ea2: // L'Ả'
-	case 0x1ea3: // L'ả'
-	case 0x1eb2: // L'Ẳ'
-	case 0x1eb3: // L'ẳ'
-	case 0x1ea8: // L'Ẩ'
-	case 0x1ea9: // L'ẩ'
-	case 0x1eba: // L'Ẻ'
-	case 0x1ebb: // L'ẻ'
-	case 0x1ec2: // L'Ể'
-	case 0x1ec3: // L'ể'
-	case 0x1ec8: // L'Ỉ'
-	case 0x1ec9: // L'ỉ'
-	case 0x1ece: // L'Ỏ'
-	case 0x1ecf: // L'ỏ'
-	case 0x1ed4: // L'Ổ'
-	case 0x1ed5: // L'ổ'
-	case 0x1ede: // L'Ở'
-	case 0x1edf: // L'ở'
-	case 0x1ee6: // L'Ủ'
-	case 0x1ee7: // L'ủ'
-	case 0x1eec: // L'Ử'
-	case 0x1eed: // L'ử'
-	case 0x1ef6: // L'Ỷ'
-	case 0x1ef7: // L'ỷ'
-		*tone = (char)0xd2;
-		return true;
-	case 0x00c3: // L'Ã'
-	case 0x00e3: // L'ã'
-	case 0x1eb4: // L'Ẵ'
-	case 0x1eb5: // L'ẵ'
-	case 0x1eaa: // L'Ẫ'
-	case 0x1eab: // L'ẫ'
-	case 0x1ebc: // L'Ẽ'
-	case 0x1ebd: // L'ẽ'
-	case 0x1ec4: // L'Ễ'
-	case 0x1ec5: // L'ễ'
-	case 0x0128: // L'Ĩ'
-	case 0x0129: // L'ĩ'
-	case 0x00d5: // L'Õ'
-	case 0x00f5: // L'õ'
-	case 0x1ed6: // L'Ỗ'
-	case 0x1ed7: // L'ỗ'
-	case 0x1ee0: // L'Ỡ'
-	case 0x1ee1: // L'ỡ'
-	case 0x0169: // L'ũ'
-	case 0x0168: // L'Ũ'
-	case 0x1eee: // L'Ữ'
-	case 0x1eef: // L'ữ'
-	case 0x1ef8: // L'Ỹ'
-	case 0x1ef9: // L'ỹ'
-		*tone = (char)0xde;
-		return true;
-	case 0x1ea0: // L'Ạ'
-	case 0x1ea1: // L'ạ'
-	case 0x1eb6: // L'Ặ'
-	case 0x1eb7: // L'ặ'
-	case 0x1eac: // L'Ậ'
-	case 0x1ead: // L'ậ'
-	case 0x1eb8: // L'Ẹ'
-	case 0x1eb9: // L'ẹ'
-	case 0x1ec6: // L'Ệ'
-	case 0x1ec7: // L'ệ'
-	case 0x1eca: // L'Ị'
-	case 0x1ecb: // L'ị'
-	case 0x1ecc: // L'Ọ'
-	case 0x1ecd: // L'ọ'
-	case 0x1ed8: // L'Ộ'
-	case 0x1ed9: // L'ộ'
-	case 0x1ee2: // L'Ợ'
-	case 0x1ee3: // L'ợ'
-	case 0x1ee4: // L'Ụ'
-	case 0x1ee5: // L'ụ'
-	case 0x1ef0: // L'Ự'
-	case 0x1ef1: // L'ự'
-	case 0x1ef4: // L'Ỵ'
-	case 0x1ef5: // L'ỵ'
-		*tone = (char)0xf2;
-		return true;
-	}
-
-	return false;
-}
-
-int EL_String_Encode_Vietnamese(const wchar_t* wide, int wideLen, char* multi, int multiLen)
-{
-	if(wideLen < 0)
-		wideLen = (int)wcslen(wide) + 1;
-
-	int src = 0;
-	int dest = 0;
-
-	if(wideLen > 0)
-	{
-		while(src < wideLen && dest < multiLen)
-		{
-			char letter;
-			if(DecomposeLetter(wide[src], &letter))
-			{
-				multi[dest++] = letter;
-			}
-
-			char tone;
-			if(DecomposeTone(wide[src], &tone) && dest < multiLen)
-			{
-				multi[dest++] = tone;
-			}
-
-			++src;
-		}
-	}
-
-	return dest;
-}
\ No newline at end of file
diff --git a/src/EterLocale/StringCodec_Vietnamese.h b/src/EterLocale/StringCodec_Vietnamese.h
deleted file mode 100644
index d1856e0..0000000
--- a/src/EterLocale/StringCodec_Vietnamese.h
+++ /dev/null
@@ -1,4 +0,0 @@
-#pragma once
-
-int EL_String_Decode_Vietnamese(const char* multi, int multiLen, wchar_t* wide, int wideLen);
-int EL_String_Encode_Vietnamese(const wchar_t* wide, int wideLen, char* multi, int multiLen);
\ No newline at end of file