diff --git a/locale_build/build_locale.bat b/locale_build/build_locale.bat
new file mode 100644
index 0000000..3f1d6c9
--- /dev/null
+++ b/locale_build/build_locale.bat
@@ -0,0 +1,35 @@
+@echo off
+
+REM Author: Sotiris Papadopoulos
+REM Last-Edited: 25/02/2015
+REM Script to auto-create a locale file.
+
+REM Usage: build_locale.bat <locale> <locale_file>
+REM Example: build_locale.bat gr_GR gr.po
+
+REM To create a new locale file copy youtube_dl_gui.po
+REM to a new locale file (e.g. gr.po) edit it with your
+REM favorite editor and then run this script.
+
+REM You also need to install gettext for Windows
+
+set FILENAME=youtube_dl_gui
+
+set /a args=0
+for %%A in (%*) do set /a args+=1
+
+if not %args% == 2 (
+	echo Usage: %~n0.bat "locale" "locale_file"
+	echo Example: %~n0.bat gr_GR gr.po
+) else (
+	mkdir ..\%FILENAME%\locale\%1\LC_MESSAGES
+
+	msgfmt.exe --output-file %FILENAME%.mo %2
+
+	move %2 ..\%FILENAME%\locale\%1\LC_MESSAGES\%FILENAME%.po 1>NUL
+	move %FILENAME%.mo ..\%FILENAME%\locale\%1\LC_MESSAGES\ 1>NUL
+
+	tree /F ..\%FILENAME%\locale\%1
+
+	echo Done
+)
diff --git a/locale_build/build_locale.sh b/locale_build/build_locale.sh
new file mode 100755
index 0000000..4b18953
--- /dev/null
+++ b/locale_build/build_locale.sh
@@ -0,0 +1,32 @@
+#!/bin/bash
+
+# Author: Sotiris Papadopoulos
+# Last-Edited: 25/02/2015
+# Script to auto-create a locale file.
+
+# Usage: ./build_locale.sh <locale> <locale_file>
+# Example: ./build_locale.sh gr_GR gr.po
+
+# To create a new locale file copy youtube_dl_gui.po
+# to a new locale file (e.g. gr.po) edit it with your
+# favorite editor and then run this script.
+
+
+FILENAME="youtube_dl_gui"
+
+if [ "$#" -ne 2 ]; then
+	echo "Usage: $0 <locale> <locale_file>"
+	echo "Example: $0 gr_GR gr.po"
+	exit 1
+fi
+
+mkdir -p "../$FILENAME/locale/$1/LC_MESSAGES/"
+
+msgfmt --output-file "$FILENAME.mo" "$2"
+
+mv "$2" "../$FILENAME/locale/$1/LC_MESSAGES/$FILENAME.po"
+mv "$FILENAME.mo" "../$FILENAME/locale/$1/LC_MESSAGES/"
+
+tree "../$FILENAME/locale/$1"
+
+echo "Done"
diff --git a/locale_build/youtube_dl_gui.po b/locale_build/youtube_dl_gui.po
new file mode 100644
index 0000000..fd1e9ea
--- /dev/null
+++ b/locale_build/youtube_dl_gui.po
@@ -0,0 +1,428 @@
+# Youtube-dlG localization file.
+# FIRST AUTHOR: Sotiris Papadopoulos <ytubedlg@gmail.com>, 2015.
+#
+msgid ""
+msgstr ""
+"Project-Id-Version: 0.3.6\n"
+"POT-Creation-Date: 2015-02-25 22:38+EET\n"
+"PO-Revision-Date: 2015-02-25 22:38+EET\n"
+"Last-Translator: Sotiris Papadopoulos <ytubedlg@gmail.com>\n"
+"Language-Team: en\n"
+"MIME-Version: 1.0\n"
+"Content-Type: text/plain; charset=UTF-8\n"
+"Content-Transfer-Encoding: 8bit\n"
+"Generated-By: pygettext.py 1.5\n"
+
+
+#: mainframe.py:77
+msgid "URLs"
+msgstr ""
+
+#: mainframe.py:78
+msgid "Download"
+msgstr ""
+
+#: mainframe.py:79
+msgid "Update"
+msgstr ""
+
+#: mainframe.py:80 optionsframe.py:40
+msgid "Options"
+msgstr ""
+
+#: mainframe.py:81
+msgid "Error"
+msgstr ""
+
+#: mainframe.py:82
+msgid "Stop"
+msgstr ""
+
+#: mainframe.py:83
+msgid "Info"
+msgstr ""
+
+#: mainframe.py:84
+msgid "Welcome"
+msgstr ""
+
+#: mainframe.py:85
+msgid "Successfully downloaded {0} url(s) in {1} day(s) {2} hour(s) {3} minute(s) {4} second(s)"
+msgstr ""
+
+#: mainframe.py:87
+msgid "Download completed"
+msgstr ""
+
+#: mainframe.py:88
+msgid "Downloading {0} url(s)"
+msgstr ""
+
+#: mainframe.py:89
+msgid "Stopping downloads"
+msgstr ""
+
+#: mainframe.py:90
+msgid "Downloads stopped"
+msgstr ""
+
+#: mainframe.py:91
+msgid "You need to provide at least one url"
+msgstr ""
+
+#: mainframe.py:92
+msgid "Download started"
+msgstr ""
+
+#: mainframe.py:94
+msgid "Downloading latest youtube-dl. Please wait..."
+msgstr ""
+
+#: mainframe.py:95
+msgid "Youtube-dl download failed [{0}]"
+msgstr ""
+
+#: mainframe.py:96
+msgid "Youtube-dl downloaded correctly"
+msgstr ""
+
+#: mainframe.py:98
+msgid "Title"
+msgstr ""
+
+#: mainframe.py:99
+msgid "Size"
+msgstr ""
+
+#: mainframe.py:100
+msgid "Percent"
+msgstr ""
+
+#: mainframe.py:101
+msgid "ETA"
+msgstr ""
+
+#: mainframe.py:102
+msgid "Speed"
+msgstr ""
+
+#: mainframe.py:103
+msgid "Status"
+msgstr ""
+
+#: optionsframe.py:42
+msgid "General"
+msgstr ""
+
+#: optionsframe.py:43
+msgid "Video"
+msgstr ""
+
+#: optionsframe.py:44
+msgid "Audio"
+msgstr ""
+
+#: optionsframe.py:45
+msgid "Playlist"
+msgstr ""
+
+#: optionsframe.py:46
+msgid "Output"
+msgstr ""
+
+#: optionsframe.py:47
+msgid "Subtitles"
+msgstr ""
+
+#: optionsframe.py:48
+msgid "Filesystem"
+msgstr ""
+
+#: optionsframe.py:49
+msgid "Shutdown"
+msgstr ""
+
+#: optionsframe.py:50
+msgid "Authentication"
+msgstr ""
+
+#: optionsframe.py:51
+msgid "Connection"
+msgstr ""
+
+#: optionsframe.py:52
+msgid "Log"
+msgstr ""
+
+#: optionsframe.py:53
+msgid "Commands"
+msgstr ""
+
+#: optionsframe.py:54
+msgid "Localization"
+msgstr ""
+
+#: optionsframe.py:372
+msgid "Enable Log"
+msgstr ""
+
+#: optionsframe.py:373
+msgid "Write Time"
+msgstr ""
+
+#: optionsframe.py:374
+msgid "Clear Log"
+msgstr ""
+
+#: optionsframe.py:375
+msgid "View Log"
+msgstr ""
+
+#: optionsframe.py:376
+msgid "Path: {0}"
+msgstr ""
+
+#: optionsframe.py:377
+msgid "Log Size: {0} Bytes"
+msgstr ""
+
+#: optionsframe.py:378 optionsframe.py:1390
+msgid "Restart"
+msgstr ""
+
+#: optionsframe.py:379
+msgid "Please restart {0}"
+msgstr ""
+
+#: optionsframe.py:487
+msgid "Shutdown when finished"
+msgstr ""
+
+#: optionsframe.py:488
+msgid "SUDO password"
+msgstr ""
+
+#: optionsframe.py:540
+msgid "Playlist Start"
+msgstr ""
+
+#: optionsframe.py:541
+msgid "Playlist Stop"
+msgstr ""
+
+#: optionsframe.py:542
+msgid "Max Downloads"
+msgstr ""
+
+#: optionsframe.py:600
+msgid "Retries"
+msgstr ""
+
+#: optionsframe.py:601
+msgid "User Agent"
+msgstr ""
+
+#: optionsframe.py:602
+msgid "Referer"
+msgstr ""
+
+#: optionsframe.py:603
+msgid "Proxy"
+msgstr ""
+
+#: optionsframe.py:677
+msgid "Username"
+msgstr ""
+
+#: optionsframe.py:678
+msgid "Password"
+msgstr ""
+
+#: optionsframe.py:679
+msgid "Video Password (vimeo, smotri)"
+msgstr ""
+
+#: optionsframe.py:737
+msgid "high"
+msgstr ""
+
+#: optionsframe.py:737
+msgid "low"
+msgstr ""
+
+#: optionsframe.py:737
+msgid "mid"
+msgstr ""
+
+#: optionsframe.py:740
+msgid "Convert to Audio"
+msgstr ""
+
+#: optionsframe.py:741
+msgid "Keep Video"
+msgstr ""
+
+#: optionsframe.py:742
+msgid "Audio Format"
+msgstr ""
+
+#: optionsframe.py:743
+msgid "Audio Quality"
+msgstr ""
+
+#: optionsframe.py:860
+msgid "default"
+msgstr ""
+
+#: optionsframe.py:861
+msgid "none"
+msgstr ""
+
+#: optionsframe.py:865
+msgid "Video Format"
+msgstr ""
+
+#: optionsframe.py:866
+msgid "Mix Format"
+msgstr ""
+
+#: optionsframe.py:925
+msgid "Restrict filenames (ASCII)"
+msgstr ""
+
+#: optionsframe.py:926
+msgid "ID as Name"
+msgstr ""
+
+#: optionsframe.py:927
+msgid "Title as Name"
+msgstr ""
+
+#: optionsframe.py:928
+msgid "Custom Template (youtube-dl)"
+msgstr ""
+
+#: optionsframe.py:1022
+msgid "Ignore Errors"
+msgstr ""
+
+#: optionsframe.py:1023
+msgid "Open destination folder"
+msgstr ""
+
+#: optionsframe.py:1024
+msgid "Write info to (.json) file"
+msgstr ""
+
+#: optionsframe.py:1025
+msgid "Write description to file"
+msgstr ""
+
+#: optionsframe.py:1026
+msgid "Write thumbnail to disk"
+msgstr ""
+
+#: optionsframe.py:1027
+msgid "Filesize"
+msgstr ""
+
+#: optionsframe.py:1028
+msgid "Min"
+msgstr ""
+
+#: optionsframe.py:1029
+msgid "Max"
+msgstr ""
+
+#: optionsframe.py:1142
+msgid "English"
+msgstr ""
+
+#: optionsframe.py:1143
+msgid "Greek"
+msgstr ""
+
+#: optionsframe.py:1144
+msgid "Portuguese"
+msgstr ""
+
+#: optionsframe.py:1145
+msgid "French"
+msgstr ""
+
+#: optionsframe.py:1146
+msgid "Italian"
+msgstr ""
+
+#: optionsframe.py:1147
+msgid "Russian"
+msgstr ""
+
+#: optionsframe.py:1148
+msgid "Spanish"
+msgstr ""
+
+#: optionsframe.py:1149
+msgid "German"
+msgstr ""
+
+#: optionsframe.py:1152
+msgid "Download subtitle file by language"
+msgstr ""
+
+#: optionsframe.py:1153
+msgid "Download all available subtitles"
+msgstr ""
+
+#: optionsframe.py:1154
+msgid "Download automatic subtitle file (YOUTUBE ONLY)"
+msgstr ""
+
+#: optionsframe.py:1155
+msgid "Embed subtitles in the video (only for mp4 videos)"
+msgstr ""
+
+#: optionsframe.py:1156
+msgid "Subtitles Language"
+msgstr ""
+
+#: optionsframe.py:1250
+msgid "About"
+msgstr ""
+
+#: optionsframe.py:1251
+msgid "Open"
+msgstr ""
+
+#: optionsframe.py:1252
+msgid "Reset Options"
+msgstr ""
+
+#: optionsframe.py:1253
+msgid "Save Path"
+msgstr ""
+
+#: optionsframe.py:1254
+msgid "Settings File: {0}"
+msgstr ""
+
+#: optionsframe.py:1255
+msgid "Choose Directory"
+msgstr ""
+
+#: optionsframe.py:1340
+msgid "Command line arguments (e.g. --help)"
+msgstr ""
+
+#: optionsframe.py:1391
+msgid "Localization Language"
+msgstr ""
+
+#: optionsframe.py:1392
+msgid "In order for the changes to take effect please restart {0}"
+msgstr ""
+
+#: optionsframe.py:1439
+msgid "Log Viewer"
+msgstr ""
+
diff --git a/setup.py b/setup.py
index f72a994..13b30b3 100644
--- a/setup.py
+++ b/setup.py
@@ -33,6 +33,7 @@ ICONS_TEMPLATE = 'youtube_dl_gui/icons/youtube-dl-gui_{size}.png'
 
 ICONS_LIST = [ICONS_TEMPLATE.format(size=size) for size in ICONS_SIZES]
 
+
 # Set icons path
 PY2EXE_ICONS = 'icons'
 WINDOWS_ICONS = os.path.join(get_python_lib(), 'youtube_dl_gui', 'icons')
@@ -41,12 +42,36 @@ LINUX_ICONS = '/usr/share/icons/hicolor/'
 LINUX_FALLBACK_ICONS = '/usr/share/pixmaps/'
 
 
+# Set localization files path
+LOCALE_PATH = os.path.join('youtube_dl_gui', 'locale')
+
+PY2EXE_LOCALE_DIR = 'locale'
+WIN_LOCALE_DIR = os.path.join(get_python_lib(), 'youtube_dl_gui', 'locale')
+LINUX_LOCALE_DIR = '/usr/share/{app_name}/locale/'.format(app_name=__appname__.lower())
+
+
 def create_scripts():
     if not os.path.exists('build/_scripts/'):
         os.makedirs('build/_scripts')
         
     shutil.copyfile('youtube_dl_gui/__main__.py', 'build/_scripts/youtube-dl-gui')
 
+    
+def set_locale_files(data_files):
+    for directory in os.listdir(LOCALE_PATH):
+        locale_lang = os.path.join(directory, 'LC_MESSAGES')
+        
+        src = os.path.join(LOCALE_PATH, locale_lang, 'youtube_dl_gui.mo')
+        
+        if PY2EXE:
+            dst = os.path.join(PY2EXE_LOCALE_DIR, locale_lang)
+        elif os.name == 'nt':
+            dst = os.path.join(WIN_LOCALE_DIR, locale_lang)
+        else:
+            dst = os.path.join(LINUX_LOCALE_DIR, locale_lang)
+            
+        data_files.append((dst, [src]))
+    
 
 def py2exe_setup():
     py2exe_dependencies = [
@@ -60,6 +85,8 @@ def py2exe_setup():
         (PY2EXE_ICONS, ICONS_LIST)
     ]
     
+    set_locale_files(py2exe_data_files)
+    
     py2exe_options = {
         'includes': ['wx.lib.pubsub.*',
                      'wx.lib.pubsub.core.*',
@@ -87,6 +114,8 @@ def normal_setup():
         icons_dir = (WINDOWS_ICONS, ICONS_LIST)
         data_files.append(icons_dir)
         
+        set_locale_files(data_files)
+        
         params = {'data_files': data_files}
     else:
         # Create all the hicolor icons
@@ -99,7 +128,9 @@ def normal_setup():
         # Add the 48x48 icon as fallback
         fallback_icon = (LINUX_FALLBACK_ICONS, [ICONS_LIST[2]])
         data_files.append(fallback_icon)
-
+    
+        set_locale_files(data_files)
+            
         create_scripts()
         params = {'data_files': data_files, 'scripts': ['build/_scripts/youtube-dl-gui']}
     
diff --git a/youtube_dl_gui/__init__.py b/youtube_dl_gui/__init__.py
index 3c46818..05beab9 100644
--- a/youtube_dl_gui/__init__.py
+++ b/youtube_dl_gui/__init__.py
@@ -15,6 +15,7 @@ Example:
 
 import sys
 import os.path
+import gettext
 
 try:
     import wx
@@ -35,28 +36,40 @@ from .info import (
     __descriptionfull__,
 )
 
-from .mainframe import MainFrame
 from .logmanager import LogManager
 from .optionsmanager import OptionsManager
 
-from .utils import get_config_path
+from .utils import (
+    get_config_path,
+    get_locale_file
+)
+
 
+# Set config path and create options and log managers
+config_path = os.path.join(get_config_path(), __appname__.lower())
 
-def main():
-    """The real main.
+opt_manager = OptionsManager(config_path)
+log_manager = None
 
-    Sets configuration path, enables the managers like OptionsManager,
-    LogManager, etc.. and creates the main app window.
+if opt_manager.options['enable_log']:
+    log_manager = LogManager(config_path, opt_manager.options['log_time'])
 
-    """
-    config_path = os.path.join(get_config_path(), __appname__.lower())
+# Set gettext before MainFrame import
+# because the GUI strings are class level attributes
+locale_dir = get_locale_file()
 
-    opt_manager = OptionsManager(config_path)
-    log_manager = None
+try:
+    gettext.translation('youtube_dl_gui', locale_dir, [opt_manager.options['locale_name']]).install(unicode=True)
+except IOError:
+    opt_manager.options['locale_name'] = 'en_US'
+    gettext.install('youtube_dl_gui')
+    
+
+from .mainframe import MainFrame
 
-    if opt_manager.options['enable_log']:
-        log_manager = LogManager(config_path, opt_manager.options['log_time'])
 
+def main():
+    """The real main. Creates and calls the main app windows. """
     app = wx.App()
     frame = MainFrame(opt_manager, log_manager)
     frame.Centre()
diff --git a/youtube_dl_gui/locale/en_US/LC_MESSAGES/youtube_dl_gui.mo b/youtube_dl_gui/locale/en_US/LC_MESSAGES/youtube_dl_gui.mo
new file mode 100644
index 0000000..903be07
Binary files /dev/null and b/youtube_dl_gui/locale/en_US/LC_MESSAGES/youtube_dl_gui.mo differ
diff --git a/youtube_dl_gui/locale/en_US/LC_MESSAGES/youtube_dl_gui.po b/youtube_dl_gui/locale/en_US/LC_MESSAGES/youtube_dl_gui.po
new file mode 100644
index 0000000..fd1e9ea
--- /dev/null
+++ b/youtube_dl_gui/locale/en_US/LC_MESSAGES/youtube_dl_gui.po
@@ -0,0 +1,428 @@
+# Youtube-dlG localization file.
+# FIRST AUTHOR: Sotiris Papadopoulos <ytubedlg@gmail.com>, 2015.
+#
+msgid ""
+msgstr ""
+"Project-Id-Version: 0.3.6\n"
+"POT-Creation-Date: 2015-02-25 22:38+EET\n"
+"PO-Revision-Date: 2015-02-25 22:38+EET\n"
+"Last-Translator: Sotiris Papadopoulos <ytubedlg@gmail.com>\n"
+"Language-Team: en\n"
+"MIME-Version: 1.0\n"
+"Content-Type: text/plain; charset=UTF-8\n"
+"Content-Transfer-Encoding: 8bit\n"
+"Generated-By: pygettext.py 1.5\n"
+
+
+#: mainframe.py:77
+msgid "URLs"
+msgstr ""
+
+#: mainframe.py:78
+msgid "Download"
+msgstr ""
+
+#: mainframe.py:79
+msgid "Update"
+msgstr ""
+
+#: mainframe.py:80 optionsframe.py:40
+msgid "Options"
+msgstr ""
+
+#: mainframe.py:81
+msgid "Error"
+msgstr ""
+
+#: mainframe.py:82
+msgid "Stop"
+msgstr ""
+
+#: mainframe.py:83
+msgid "Info"
+msgstr ""
+
+#: mainframe.py:84
+msgid "Welcome"
+msgstr ""
+
+#: mainframe.py:85
+msgid "Successfully downloaded {0} url(s) in {1} day(s) {2} hour(s) {3} minute(s) {4} second(s)"
+msgstr ""
+
+#: mainframe.py:87
+msgid "Download completed"
+msgstr ""
+
+#: mainframe.py:88
+msgid "Downloading {0} url(s)"
+msgstr ""
+
+#: mainframe.py:89
+msgid "Stopping downloads"
+msgstr ""
+
+#: mainframe.py:90
+msgid "Downloads stopped"
+msgstr ""
+
+#: mainframe.py:91
+msgid "You need to provide at least one url"
+msgstr ""
+
+#: mainframe.py:92
+msgid "Download started"
+msgstr ""
+
+#: mainframe.py:94
+msgid "Downloading latest youtube-dl. Please wait..."
+msgstr ""
+
+#: mainframe.py:95
+msgid "Youtube-dl download failed [{0}]"
+msgstr ""
+
+#: mainframe.py:96
+msgid "Youtube-dl downloaded correctly"
+msgstr ""
+
+#: mainframe.py:98
+msgid "Title"
+msgstr ""
+
+#: mainframe.py:99
+msgid "Size"
+msgstr ""
+
+#: mainframe.py:100
+msgid "Percent"
+msgstr ""
+
+#: mainframe.py:101
+msgid "ETA"
+msgstr ""
+
+#: mainframe.py:102
+msgid "Speed"
+msgstr ""
+
+#: mainframe.py:103
+msgid "Status"
+msgstr ""
+
+#: optionsframe.py:42
+msgid "General"
+msgstr ""
+
+#: optionsframe.py:43
+msgid "Video"
+msgstr ""
+
+#: optionsframe.py:44
+msgid "Audio"
+msgstr ""
+
+#: optionsframe.py:45
+msgid "Playlist"
+msgstr ""
+
+#: optionsframe.py:46
+msgid "Output"
+msgstr ""
+
+#: optionsframe.py:47
+msgid "Subtitles"
+msgstr ""
+
+#: optionsframe.py:48
+msgid "Filesystem"
+msgstr ""
+
+#: optionsframe.py:49
+msgid "Shutdown"
+msgstr ""
+
+#: optionsframe.py:50
+msgid "Authentication"
+msgstr ""
+
+#: optionsframe.py:51
+msgid "Connection"
+msgstr ""
+
+#: optionsframe.py:52
+msgid "Log"
+msgstr ""
+
+#: optionsframe.py:53
+msgid "Commands"
+msgstr ""
+
+#: optionsframe.py:54
+msgid "Localization"
+msgstr ""
+
+#: optionsframe.py:372
+msgid "Enable Log"
+msgstr ""
+
+#: optionsframe.py:373
+msgid "Write Time"
+msgstr ""
+
+#: optionsframe.py:374
+msgid "Clear Log"
+msgstr ""
+
+#: optionsframe.py:375
+msgid "View Log"
+msgstr ""
+
+#: optionsframe.py:376
+msgid "Path: {0}"
+msgstr ""
+
+#: optionsframe.py:377
+msgid "Log Size: {0} Bytes"
+msgstr ""
+
+#: optionsframe.py:378 optionsframe.py:1390
+msgid "Restart"
+msgstr ""
+
+#: optionsframe.py:379
+msgid "Please restart {0}"
+msgstr ""
+
+#: optionsframe.py:487
+msgid "Shutdown when finished"
+msgstr ""
+
+#: optionsframe.py:488
+msgid "SUDO password"
+msgstr ""
+
+#: optionsframe.py:540
+msgid "Playlist Start"
+msgstr ""
+
+#: optionsframe.py:541
+msgid "Playlist Stop"
+msgstr ""
+
+#: optionsframe.py:542
+msgid "Max Downloads"
+msgstr ""
+
+#: optionsframe.py:600
+msgid "Retries"
+msgstr ""
+
+#: optionsframe.py:601
+msgid "User Agent"
+msgstr ""
+
+#: optionsframe.py:602
+msgid "Referer"
+msgstr ""
+
+#: optionsframe.py:603
+msgid "Proxy"
+msgstr ""
+
+#: optionsframe.py:677
+msgid "Username"
+msgstr ""
+
+#: optionsframe.py:678
+msgid "Password"
+msgstr ""
+
+#: optionsframe.py:679
+msgid "Video Password (vimeo, smotri)"
+msgstr ""
+
+#: optionsframe.py:737
+msgid "high"
+msgstr ""
+
+#: optionsframe.py:737
+msgid "low"
+msgstr ""
+
+#: optionsframe.py:737
+msgid "mid"
+msgstr ""
+
+#: optionsframe.py:740
+msgid "Convert to Audio"
+msgstr ""
+
+#: optionsframe.py:741
+msgid "Keep Video"
+msgstr ""
+
+#: optionsframe.py:742
+msgid "Audio Format"
+msgstr ""
+
+#: optionsframe.py:743
+msgid "Audio Quality"
+msgstr ""
+
+#: optionsframe.py:860
+msgid "default"
+msgstr ""
+
+#: optionsframe.py:861
+msgid "none"
+msgstr ""
+
+#: optionsframe.py:865
+msgid "Video Format"
+msgstr ""
+
+#: optionsframe.py:866
+msgid "Mix Format"
+msgstr ""
+
+#: optionsframe.py:925
+msgid "Restrict filenames (ASCII)"
+msgstr ""
+
+#: optionsframe.py:926
+msgid "ID as Name"
+msgstr ""
+
+#: optionsframe.py:927
+msgid "Title as Name"
+msgstr ""
+
+#: optionsframe.py:928
+msgid "Custom Template (youtube-dl)"
+msgstr ""
+
+#: optionsframe.py:1022
+msgid "Ignore Errors"
+msgstr ""
+
+#: optionsframe.py:1023
+msgid "Open destination folder"
+msgstr ""
+
+#: optionsframe.py:1024
+msgid "Write info to (.json) file"
+msgstr ""
+
+#: optionsframe.py:1025
+msgid "Write description to file"
+msgstr ""
+
+#: optionsframe.py:1026
+msgid "Write thumbnail to disk"
+msgstr ""
+
+#: optionsframe.py:1027
+msgid "Filesize"
+msgstr ""
+
+#: optionsframe.py:1028
+msgid "Min"
+msgstr ""
+
+#: optionsframe.py:1029
+msgid "Max"
+msgstr ""
+
+#: optionsframe.py:1142
+msgid "English"
+msgstr ""
+
+#: optionsframe.py:1143
+msgid "Greek"
+msgstr ""
+
+#: optionsframe.py:1144
+msgid "Portuguese"
+msgstr ""
+
+#: optionsframe.py:1145
+msgid "French"
+msgstr ""
+
+#: optionsframe.py:1146
+msgid "Italian"
+msgstr ""
+
+#: optionsframe.py:1147
+msgid "Russian"
+msgstr ""
+
+#: optionsframe.py:1148
+msgid "Spanish"
+msgstr ""
+
+#: optionsframe.py:1149
+msgid "German"
+msgstr ""
+
+#: optionsframe.py:1152
+msgid "Download subtitle file by language"
+msgstr ""
+
+#: optionsframe.py:1153
+msgid "Download all available subtitles"
+msgstr ""
+
+#: optionsframe.py:1154
+msgid "Download automatic subtitle file (YOUTUBE ONLY)"
+msgstr ""
+
+#: optionsframe.py:1155
+msgid "Embed subtitles in the video (only for mp4 videos)"
+msgstr ""
+
+#: optionsframe.py:1156
+msgid "Subtitles Language"
+msgstr ""
+
+#: optionsframe.py:1250
+msgid "About"
+msgstr ""
+
+#: optionsframe.py:1251
+msgid "Open"
+msgstr ""
+
+#: optionsframe.py:1252
+msgid "Reset Options"
+msgstr ""
+
+#: optionsframe.py:1253
+msgid "Save Path"
+msgstr ""
+
+#: optionsframe.py:1254
+msgid "Settings File: {0}"
+msgstr ""
+
+#: optionsframe.py:1255
+msgid "Choose Directory"
+msgstr ""
+
+#: optionsframe.py:1340
+msgid "Command line arguments (e.g. --help)"
+msgstr ""
+
+#: optionsframe.py:1391
+msgid "Localization Language"
+msgstr ""
+
+#: optionsframe.py:1392
+msgid "In order for the changes to take effect please restart {0}"
+msgstr ""
+
+#: optionsframe.py:1439
+msgid "Log Viewer"
+msgstr ""
+
diff --git a/youtube_dl_gui/mainframe.py b/youtube_dl_gui/mainframe.py
index e9aef1b..a0a8663 100644
--- a/youtube_dl_gui/mainframe.py
+++ b/youtube_dl_gui/mainframe.py
@@ -2,6 +2,8 @@
 
 """Youtubedlg module responsible for the main app window. """
 
+import gettext
+
 import wx
 from wx.lib.pubsub import setuparg1
 from wx.lib.pubsub import pub as Publisher
@@ -72,33 +74,33 @@ class MainFrame(wx.Frame):
     SIZE_5 = 5
 
     # Labels area
-    URLS_LABEL = "URLs"
-    DOWNLOAD_LABEL = "Download"
-    UPDATE_LABEL = "Update"
-    OPTIONS_LABEL = "Options"
-    ERROR_LABEL = "Error"
-    STOP_LABEL = "Stop"
-    INFO_LABEL = "Info"
-    WELCOME_MSG = "Welcome"
-    SUCC_REPORT_MSG = ("Successfully downloaded {0} url(s) in {1} "
+    URLS_LABEL = _("URLs")
+    DOWNLOAD_LABEL = _("Download")
+    UPDATE_LABEL = _("Update")
+    OPTIONS_LABEL = _("Options")
+    ERROR_LABEL = _("Error")
+    STOP_LABEL = _("Stop")
+    INFO_LABEL = _("Info")
+    WELCOME_MSG = _("Welcome")
+    SUCC_REPORT_MSG = _("Successfully downloaded {0} url(s) in {1} "
                        "day(s) {2} hour(s) {3} minute(s) {4} second(s)")
-    DL_COMPLETED_MSG = "Download completed"
-    URL_REPORT_MSG = "Downloading {0} url(s)"
-    CLOSING_MSG = "Stopping downloads"
-    CLOSED_MSG = "Downloads stopped"
-    PROVIDE_URL_MSG = "You need to provide at least one url"
-    DOWNLOAD_STARTED = "Download started"
-    
-    UPDATING_MSG = "Downloading latest youtube-dl. Please wait..."
-    UPDATE_ERR_MSG = "Youtube-dl download failed [{0}]"
-    UPDATE_SUCC_MSG = "Youtube-dl downloaded correctly"
-
-    VIDEO_LABEL = "Video"
-    SIZE_LABEL = "Size"
-    PERCENT_LABEL = "Percent"
-    ETA_LABEL = "ETA"
-    SPEED_LABEL = "Speed"
-    STATUS_LABEL = "Status"
+    DL_COMPLETED_MSG = _("Download completed")
+    URL_REPORT_MSG = _("Downloading {0} url(s)")
+    CLOSING_MSG = _("Stopping downloads")
+    CLOSED_MSG = _("Downloads stopped")
+    PROVIDE_URL_MSG = _("You need to provide at least one url")
+    DOWNLOAD_STARTED = _("Download started")
+
+    UPDATING_MSG = _("Downloading latest youtube-dl. Please wait...")
+    UPDATE_ERR_MSG = _("Youtube-dl download failed [{0}]")
+    UPDATE_SUCC_MSG = _("Youtube-dl downloaded correctly")
+
+    VIDEO_LABEL = _("Title")
+    SIZE_LABEL = _("Size")
+    PERCENT_LABEL = _("Percent")
+    ETA_LABEL = _("ETA")
+    SPEED_LABEL = _("Speed")
+    STATUS_LABEL = _("Status")
     #################################
 
     STATUSLIST_COLUMNS = (
diff --git a/youtube_dl_gui/optionsframe.py b/youtube_dl_gui/optionsframe.py
index 561ced4..ac1bc79 100644
--- a/youtube_dl_gui/optionsframe.py
+++ b/youtube_dl_gui/optionsframe.py
@@ -3,6 +3,7 @@
 """Youtubedlg module responsible for the options window. """
 
 import os
+import gettext
 
 import wx
 
@@ -36,20 +37,21 @@ class OptionsFrame(wx.Frame):
 
     FRAME_SIZE = (640, 270)
 
-    FRAME_TITLE = "Options"
-
-    GENERAL_TAB = "General"
-    VIDEO_TAB = "Video"
-    AUDIO_TAB = "Audio"
-    PLAYLIST_TAB = "Playlist"
-    OUTPUT_TAB = "Output"
-    SUBTITLES_TAB = "Subtitles"
-    FILESYS_TAB = "Filesystem"
-    SHUTDOWN_TAB = "Shutdown"
-    AUTH_TAB = "Authentication"
-    CONNECTION_TAB = "Connection"
-    LOG_TAB = "Log"
-    CMD_TAB = "Commands"
+    FRAME_TITLE = _("Options")
+
+    GENERAL_TAB = _("General")
+    VIDEO_TAB = _("Video")
+    AUDIO_TAB = _("Audio")
+    PLAYLIST_TAB = _("Playlist")
+    OUTPUT_TAB = _("Output")
+    SUBTITLES_TAB = _("Subtitles")
+    FILESYS_TAB = _("Filesystem")
+    SHUTDOWN_TAB = _("Shutdown")
+    AUTH_TAB = _("Authentication")
+    CONNECTION_TAB = _("Connection")
+    LOG_TAB = _("Log")
+    CMD_TAB = _("Commands")
+    LOCALIZATION_TAB = _("Localization")
 
     def __init__(self, parent):
         wx.Frame.__init__(self, parent, title=self.FRAME_TITLE, size=self.FRAME_SIZE)
@@ -79,7 +81,8 @@ class OptionsFrame(wx.Frame):
             (AuthenticationTab(*tab_args), self.AUTH_TAB),
             (ConnectionTab(*tab_args), self.CONNECTION_TAB),
             (LogTab(*tab_args), self.LOG_TAB),
-            (CMDTab(*tab_args), self.CMD_TAB)
+            (CMDTab(*tab_args), self.CMD_TAB),
+            (LocalizationTab(*tab_args), self.LOCALIZATION_TAB)
         )
 
         # Add tabs on notebook
@@ -91,7 +94,7 @@ class OptionsFrame(wx.Frame):
         panel.SetSizer(sizer)
 
         self.Bind(wx.EVT_CLOSE, self._on_close)
-
+        
         self.load_all_options()
 
     def _on_close(self, event):
@@ -366,14 +369,14 @@ class LogTab(TabPanel):
 
     """
 
-    ENABLE_LABEL = "Enable Log"
-    WRITE_LABEL = "Write Time"
-    CLEAR_LABEL = "Clear Log"
-    VIEW_LABEL = "View Log"
-    PATH_LABEL = "Path: {0}"
-    LOGSIZE_LABEL = "Log Size: {0} Bytes"
-    RESTART_LABEL = "Restart"
-    RESTART_MSG = "Please restart {0}"
+    ENABLE_LABEL = _("Enable Log")
+    WRITE_LABEL = _("Write Time")
+    CLEAR_LABEL = _("Clear Log")
+    VIEW_LABEL = _("View Log")
+    PATH_LABEL = _("Path: {0}")
+    LOGSIZE_LABEL = _("Log Size: {0} Bytes")
+    RESTART_LABEL = _("Restart")
+    RESTART_MSG = _("Please restart {0}")
 
     def __init__(self, *args, **kwargs):
         super(LogTab, self).__init__(*args, **kwargs)
@@ -481,8 +484,8 @@ class ShutdownTab(TabPanel):
 
     TEXTCTRL_SIZE = (250, 25)
 
-    SHUTDOWN_LABEL = "Shutdown when finished"
-    SUDO_LABEL = "SUDO password"
+    SHUTDOWN_LABEL = _("Shutdown when finished")
+    SUDO_LABEL = _("SUDO password")
 
     def __init__(self, *args, **kwargs):
         super(ShutdownTab, self).__init__(*args, **kwargs)
@@ -534,9 +537,9 @@ class PlaylistTab(TabPanel):
 
     """
 
-    START_LABEL = "Playlist Start"
-    STOP_LABEL = "Playlist Stop"
-    MAX_LABEL = "Max Downloads"
+    START_LABEL = _("Playlist Start")
+    STOP_LABEL = _("Playlist Stop")
+    MAX_LABEL = _("Max Downloads")
 
     def __init__(self, *args, **kwargs):
         super(PlaylistTab, self).__init__(*args, **kwargs)
@@ -594,10 +597,10 @@ class ConnectionTab(TabPanel):
 
     SPINCTRL_SIZE = (60, -1)
 
-    RETRIES_LABEL = "Retries"
-    USERAGENT_LABEL = "User Agent"
-    REF_LABEL = "Referer"
-    PROXY_LABEL = "Proxy"
+    RETRIES_LABEL = _("Retries")
+    USERAGENT_LABEL = _("User Agent")
+    REF_LABEL = _("Referer")
+    PROXY_LABEL = _("Proxy")
 
     def __init__(self, *args, **kwargs):
         super(ConnectionTab, self).__init__(*args, **kwargs)
@@ -671,9 +674,9 @@ class AuthenticationTab(TabPanel):
 
     TEXTCTRL_SIZE = (250, 25)
 
-    USERNAME_LABEL = "Username"
-    PASSWORD_LABEL = "Password"
-    VIDEOPASS_LABEL = "Video Password (vimeo, smotri)"
+    USERNAME_LABEL = _("Username")
+    PASSWORD_LABEL = _("Password")
+    VIDEOPASS_LABEL = _("Video Password (vimeo, smotri)")
 
     def __init__(self, *args, **kwargs):
         super(AuthenticationTab, self).__init__(*args, **kwargs)
@@ -731,13 +734,13 @@ class AudioTab(TabPanel):
         *_LABEL (string): Constant string label for the widgets.
 
     """
-    AUDIO_QUALITY = twodict([("0", "high"), ("5", "mid"), ("9", "low")])
+    AUDIO_QUALITY = twodict([("0", _("high")), ("5", _("mid")), ("9", _("low"))])
     AUDIO_FORMATS = ["mp3", "wav", "aac", "m4a", "vorbis"]
     
-    TO_AUDIO_LABEL = "Convert to Audio"
-    KEEP_VIDEO_LABEL = "Keep Video"
-    AUDIO_FORMAT_LABEL = "Audio Format"
-    AUDIO_QUALITY_LABEL = "Audio Quality"
+    TO_AUDIO_LABEL = _("Convert to Audio")
+    KEEP_VIDEO_LABEL = _("Keep Video")
+    AUDIO_FORMAT_LABEL = _("Audio Format")
+    AUDIO_QUALITY_LABEL = _("Audio Quality")
 
     def __init__(self, *args, **kwargs):
         super(AudioTab, self).__init__(*args, **kwargs)
@@ -854,13 +857,13 @@ class VideoTab(TabPanel):
         ("172", "webm 256k (DASH AUDIO)")
     ])
     
-    VIDEO_FORMATS = ["default"] + FORMATS.values()
-    SECOND_VIDEO_FORMATS = ["none"] + FORMATS.values()
+    VIDEO_FORMATS = [_("default")] + FORMATS.values()
+    SECOND_VIDEO_FORMATS = [_("none")] + FORMATS.values()
 
     COMBOBOX_SIZE = (200, 30)
 
-    VIDEO_FORMAT_LABEL = "Video Format"
-    SEC_VIDEOFORMAT_LABEL = "Mix Format"
+    VIDEO_FORMAT_LABEL = _("Video Format")
+    SEC_VIDEOFORMAT_LABEL = _("Mix Format")
 
     def __init__(self, *args, **kwargs):
         super(VideoTab, self).__init__(*args, **kwargs)
@@ -919,10 +922,10 @@ class OutputTab(TabPanel):
 
     TEXTCTRL_SIZE = (300, 20)
 
-    RESTRICT_LABEL = "Restrict filenames (ASCII)"
-    ID_AS_NAME = "ID as Name"
-    TITLE_AS_NAME = "Title as Name"
-    CUST_TITLE = "Custom Template (youtube-dl)"
+    RESTRICT_LABEL = _("Restrict filenames (ASCII)")
+    ID_AS_NAME = _("ID as Name")
+    TITLE_AS_NAME = _("Title as Name")
+    CUST_TITLE = _("Custom Template (youtube-dl)")
 
     def __init__(self, *args, **kwargs):
         super(OutputTab, self).__init__(*args, **kwargs)
@@ -1016,14 +1019,14 @@ class FilesystemTab(TabPanel):
         ("y", "Yottabytes")
     ])
     
-    IGN_ERR_LABEL = "Ignore Errors"
-    OPEN_DIR_LABEL = "Open destination folder"
-    WRT_INFO_LABEL = "Write info to (.json) file"
-    WRT_DESC_LABEL = "Write description to file"
-    WRT_THMB_LABEL = "Write thumbnail to disk"
-    FILESIZE_LABEL = "Filesize"
-    MIN_LABEL = "Min"
-    MAX_LABEL = "Max"
+    IGN_ERR_LABEL = _("Ignore Errors")
+    OPEN_DIR_LABEL = _("Open destination folder")
+    WRT_INFO_LABEL = _("Write info to (.json) file")
+    WRT_DESC_LABEL = _("Write description to file")
+    WRT_THMB_LABEL = _("Write thumbnail to disk")
+    FILESIZE_LABEL = _("Filesize")
+    MIN_LABEL = _("Min")
+    MAX_LABEL = _("Max")
 
     def __init__(self, *args, **kwargs):
         super(FilesystemTab, self).__init__(*args, **kwargs)
@@ -1136,21 +1139,21 @@ class SubtitlesTab(TabPanel):
 
     """
     SUBS_LANG = twodict([
-        ("en", "English"),
-        ("gr", "Greek"),
-        ("pt", "Portuguese"),
-        ("fr", "French"),
-        ("it", "Italian"),
-        ("ru", "Russian"),
-        ("es", "Spanish"),
-        ("de", "German")
+        ("en", _("English")),
+        ("gr", _("Greek")),
+        ("pt", _("Portuguese")),
+        ("fr", _("French")),
+        ("it", _("Italian")),
+        ("ru", _("Russian")),
+        ("es", _("Spanish")),
+        ("de", _("German"))
     ])
 
-    DL_SUBS_LABEL = "Download subtitle file by language"
-    DL_ALL_SUBS_LABEL = "Download all available subtitles"
-    DL_AUTO_SUBS_LABEL = "Download automatic subtitle file (YOUTUBE ONLY)"
-    EMBED_SUBS_LABEL = "Embed subtitles in the video (only for mp4 videos)"
-    SUBS_LANG_LABEL = "Subtitles Language"
+    DL_SUBS_LABEL = _("Download subtitle file by language")
+    DL_ALL_SUBS_LABEL = _("Download all available subtitles")
+    DL_AUTO_SUBS_LABEL = _("Download automatic subtitle file (YOUTUBE ONLY)")
+    EMBED_SUBS_LABEL = _("Embed subtitles in the video (only for mp4 videos)")
+    SUBS_LANG_LABEL = _("Subtitles Language")
 
     def __init__(self, *args, **kwargs):
         super(SubtitlesTab, self).__init__(*args, **kwargs)
@@ -1244,12 +1247,12 @@ class GeneralTab(TabPanel):
 
     BUTTONS_SIZE = (110, 40)
 
-    ABOUT_LABEL = "About"
-    OPEN_LABEL = "Open"
-    RESET_LABEL = "Reset Options"
-    SAVEPATH_LABEL = "Save Path"
-    SETTINGS_DIR_LABEL = "Settings File: {0}"
-    PICK_DIR_LABEL = "Choose Directory"
+    ABOUT_LABEL = _("About")
+    OPEN_LABEL = _("Open")
+    RESET_LABEL = _("Reset Options")
+    SAVEPATH_LABEL = _("Save Path")
+    SETTINGS_DIR_LABEL = _("Settings File: {0}")
+    PICK_DIR_LABEL = _("Choose Directory")
 
     def __init__(self, *args, **kwargs):
         super(GeneralTab, self).__init__(*args, **kwargs)
@@ -1334,7 +1337,7 @@ class CMDTab(TabPanel):
 
     """
 
-    CMD_LABEL = "Command line arguments (e.g. --help)"
+    CMD_LABEL = _("Command line arguments (e.g. --help)")
 
     def __init__(self, *args, **kwargs):
         super(CMDTab, self).__init__(*args, **kwargs)
@@ -1362,7 +1365,63 @@ class CMDTab(TabPanel):
 
     def save_options(self):
         self.opt_manager.options['cmd_args'] = self.cmd_args_box.GetValue()
+        
+        
+class LocalizationTab(TabPanel):
+
+    """Options frame localization tab.
 
+    Attributes:
+        COMBOBOX_SIZE (tuple): Tuple that contains the size(width, height)
+            of the combobox widget.
+            
+        LOCALE_NAMES (TwoWayOrderedDict): Stores the locale names.
+        
+        *_LABEL (string): Constant string label for the widgets.
+
+    """
+    
+    COMBOBOX_SIZE = (150, 30)
+
+    LOCALE_NAMES = twodict([
+        ('en_US', 'English')
+    ])
+    
+    RESTART_LABEL = _("Restart")
+    LOCALE_LABEL = _("Localization Language")
+    RESTART_MSG = _("In order for the changes to take effect please restart {0}")
+
+    def __init__(self, *args, **kwargs):
+        super(LocalizationTab, self).__init__(*args, **kwargs)
+
+        self.locale_text = self.create_statictext(self.LOCALE_LABEL)
+        self.locale_box = self.create_combobox(self.LOCALE_NAMES.values(), self.COMBOBOX_SIZE, self._on_locale)
+
+        self._set_sizer()
+
+    def _set_sizer(self):
+        main_sizer = wx.BoxSizer(wx.VERTICAL)
+
+        main_sizer.AddSpacer(self.SIZE_50)
+        main_sizer.Add(self.locale_text, flag=wx.ALIGN_CENTER_HORIZONTAL)
+
+        main_sizer.AddSpacer(self.SIZE_10)
+        main_sizer.Add(self.locale_box, flag=wx.ALIGN_CENTER_HORIZONTAL)
+
+        self.SetSizer(main_sizer)
+
+    def _on_locale(self, event):
+        """Event handler for the self.locale_box widget. """
+        self.create_popup(self.RESTART_MSG.format(__appname__),
+                          self.RESTART_LABEL,
+                          wx.OK | wx.ICON_INFORMATION)
+        
+    def load_options(self):
+        self.locale_box.SetValue(self.LOCALE_NAMES[self.opt_manager.options['locale_name']])
+    
+    def save_options(self):
+        self.opt_manager.options['locale_name'] = self.LOCALE_NAMES[self.locale_box.GetValue()]
+    
 
 class LogGUI(wx.Frame):
 
@@ -1377,7 +1436,7 @@ class LogGUI(wx.Frame):
 
     """
 
-    TITLE = "Log Viewer"
+    TITLE = _("Log Viewer")
     FRAME_SIZE = (650, 200)
 
     def __init__(self, parent=None):
diff --git a/youtube_dl_gui/optionsmanager.py b/youtube_dl_gui/optionsmanager.py
index 963aaef..3264d29 100644
--- a/youtube_dl_gui/optionsmanager.py
+++ b/youtube_dl_gui/optionsmanager.py
@@ -178,6 +178,8 @@ class OptionsManager(object):
             
             workers_number (int): Number of download workers that download manager
                 will spawn. Must be greater than zero.
+                
+            locale_name (string): Locale name (e.g. ru_RU).
 
         """
         self.options = {
@@ -221,7 +223,8 @@ class OptionsManager(object):
             'cmd_args': '',
             'enable_log': True,
             'log_time': False,
-            'workers_number': 3
+            'workers_number': 3,
+            'locale_name': 'en_US'
         }
 
     def load_from_file(self):
diff --git a/youtube_dl_gui/utils.py b/youtube_dl_gui/utils.py
index f87ed16..b019916 100644
--- a/youtube_dl_gui/utils.py
+++ b/youtube_dl_gui/utils.py
@@ -14,6 +14,8 @@ import os
 import sys
 import subprocess
 
+from .info import __appname__
+
 
 _RANDOM_OBJECT = object()
 
@@ -108,6 +110,37 @@ def get_time(seconds):
 
     return dtime
 
+    
+def get_locale_file():
+    """Search for youtube-dlg locale file.
+    
+    Returns:
+        The path to youtube-dlg locale file if exists else None.
+        
+    Note:
+        Paths that get_locale_file() func searches:
+        
+        Windows: __main__ dir.
+        Linux: __main__ dir, /usr/share/youtube-dlg
+    
+    """
+    DIR_NAME = 'locale'
+    
+    # __main__ dir
+    directory = os.path.join(absolute_path(sys.argv[0]), DIR_NAME)
+    
+    if os.path.isdir(directory):
+        return directory
+        
+    if os.name != 'nt':
+        # /usr/share/youtube-dlg
+        directory = os.path.join('/usr', 'share', __appname__.lower(), DIR_NAME)
+        
+        if os.path.isdir(directory):
+            return directory
+
+    return None
+    
 
 def get_icon_file():
     """Search for youtube-dlg app icon.