Implement translation support for ScummVM GUI.

Based on patch #2903830: "Updated Translation Prototype" by alexbevi
which in turn is based on patch #1739965 by jvprat.

Currently it builds all translations right into ScummVM. Once the
feature will be accepted more widely, i.e. more translations will
pop up, it will be trivial to move translation strings to external
file.

Finished translation: Russian
Unfinished translation: Hungarian

Things which are nice to do:
 - Language code -> language mapping for more user friendness
 - Specifying fonts to be used with language
 - Updating of interface language without restart. It will require
   moving of much code to reflowLayout() methods for each dialog

The .po files must be in single byte encodings. I.e. no support
for Unicode.

svn-id: r49759

1 files changed, 118 insertions, 77 deletions

diff --git a/gui/options.cpp b/gui/options.cpp
index 212e90f9f0..9ea3c7a1e8 100644
--- a/gui/options.cpp
+++ b/gui/options.cpp
@@ -35,6 +35,7 @@
 #include "common/fs.h"
 #include "common/config-manager.h"
 #include "common/system.h"
+#include "common/translation.h"
 
 #include "graphics/scaler.h"
 
@@ -67,9 +68,9 @@ enum {
 };
 #endif
 
-static const char *savePeriodLabels[] = { "Never", "every 5 mins", "every 10 mins", "every 15 mins", "every 30 mins", 0 };
+static const char *savePeriodLabels[] = { _s("Never"), _s("every 5 mins"), _s("every 10 mins"), _s("every 15 mins"), _s("every 30 mins"), 0 };
 static const int savePeriodValues[] = { 0, 5 * 60, 10 * 60, 15 * 60, 30 * 60, -1 };
-static const char *outputRateLabels[] = { "<default>", "8 kHz", "11kHz", "22 kHz", "44 kHz", "48 kHz", 0 };
+static const char *outputRateLabels[] = { _s("<default>"), _s("8 kHz"), _s("11kHz"), _s("22 kHz"), _s("44 kHz"), _s("48 kHz"), 0 };
 static const int outputRateValues[] = { 0, 8000, 11025, 22050, 44100, 48000, -1 };
 
 
@@ -85,15 +86,15 @@ OptionsDialog::OptionsDialog(const Common::String &domain, const Common::String
 }
 
 const char *OptionsDialog::_subModeDesc[] = {
-	"Speech Only",
-	"Speech and Subtitles",
-	"Subtitles Only"
+	_s("Speech Only"),
+	_s("Speech and Subtitles"),
+	_s("Subtitles Only")
 };
 
 const char *OptionsDialog::_lowresSubModeDesc[] = {
-	"Speech Only",
-	"Speech & Subs",
-	"Subtitles Only"
+	_s("Speech Only"),
+	_s("Speech & Subs"),
+	_s("Subtitles Only")
 };
 
 void OptionsDialog::init() {
@@ -222,7 +223,7 @@ void OptionsDialog::open() {
 
 		Common::String soundFont(ConfMan.get("soundfont", _domain));
 		if (soundFont.empty() || !ConfMan.hasKey("soundfont", _domain)) {
-			_soundFont->setLabel("None");
+			_soundFont->setLabel(_("None"));
 			_soundFontClearButton->setEnabled(false);
 		} else {
 			_soundFont->setLabel(soundFont);
@@ -267,7 +268,7 @@ void OptionsDialog::open() {
 		int speed;		int sliderMaxValue = _subSpeedSlider->getMaxValue();
 
 		_subMode = getSubtitleMode(ConfMan.getBool("subtitles", _domain), ConfMan.getBool("speech_mute", _domain));
-		_subToggleButton->setLabel(_subModeDesc[_subMode]);
+		_subToggleButton->setLabel(_(_subModeDesc[_subMode]));
 
 		// Engines that reuse the subtitle speed widget set their own max value.
 		// Scale the config value accordingly (see addSubtitleControls)
@@ -378,7 +379,7 @@ void OptionsDialog::close() {
 				ConfMan.setInt("midi_gain", _midiGainSlider->getValue(), _domain);
 
 				Common::String soundFont(_soundFont->getLabel());
-				if (!soundFont.empty() && (soundFont != "None"))
+				if (!soundFont.empty() && (soundFont != _("None")))
 					ConfMan.set("soundfont", soundFont, _domain);
 				else
 					ConfMan.removeKey("soundfont", _domain);
@@ -465,7 +466,7 @@ void OptionsDialog::handleCommand(CommandSender *sender, uint32 cmd, uint32 data
 		else
 			_subMode = 0;
 
-		_subToggleButton->setLabel(g_system->getOverlayWidth() > 320 ? _subModeDesc[_subMode] : _lowresSubModeDesc[_subMode]);
+		_subToggleButton->setLabel(g_system->getOverlayWidth() > 320 ? _(_subModeDesc[_subMode]) : _(_lowresSubModeDesc[_subMode]));
 		_subToggleButton->draw();
 		_subSpeedDesc->draw();
 		_subSpeedSlider->draw();
@@ -476,7 +477,7 @@ void OptionsDialog::handleCommand(CommandSender *sender, uint32 cmd, uint32 data
 		_subSpeedLabel->draw();
 		break;
 	case kClearSoundFontCmd:
-		_soundFont->setLabel("None");
+		_soundFont->setLabel(_("None"));
 		_soundFontClearButton->setEnabled(false);
 		draw();
 		break;
@@ -522,7 +523,7 @@ void OptionsDialog::setMIDISettingsState(bool enabled) {
 	_soundFontButton->setEnabled(enabled);
 	_soundFont->setEnabled(enabled);
 
-	if (enabled && !_soundFont->getLabel().empty() && (_soundFont->getLabel() != "None"))
+	if (enabled && !_soundFont->getLabel().empty() && (_soundFont->getLabel() != _("None")))
 		_soundFontClearButton->setEnabled(enabled);
 	else
 		_soundFontClearButton->setEnabled(false);
@@ -591,64 +592,64 @@ void OptionsDialog::addGraphicControls(GuiObject *boss, const Common::String &pr
 	const OSystem::GraphicsMode *gm = g_system->getSupportedGraphicsModes();
 
 	// The GFX mode popup
-	_gfxPopUpDesc = new StaticTextWidget(boss, prefix + "grModePopupDesc", "Graphics mode:");
+	_gfxPopUpDesc = new StaticTextWidget(boss, prefix + "grModePopupDesc", _("Graphics mode:"));
 	_gfxPopUp = new PopUpWidget(boss, prefix + "grModePopup");
 
-	_gfxPopUp->appendEntry("<default>");
+	_gfxPopUp->appendEntry(_("<default>"));
 	_gfxPopUp->appendEntry("");
 	while (gm->name) {
-		_gfxPopUp->appendEntry(gm->description, gm->id);
+		_gfxPopUp->appendEntry(_(gm->description), gm->id);
 		gm++;
 	}
 
 	// RenderMode popup
-	_renderModePopUpDesc = new StaticTextWidget(boss, prefix + "grRenderPopupDesc", "Render mode:");
+	_renderModePopUpDesc = new StaticTextWidget(boss, prefix + "grRenderPopupDesc", _("Render mode:"));
 	_renderModePopUp = new PopUpWidget(boss, prefix + "grRenderPopup");
-	_renderModePopUp->appendEntry("<default>", Common::kRenderDefault);
+	_renderModePopUp->appendEntry(_("<default>"), Common::kRenderDefault);
 	_renderModePopUp->appendEntry("");
 	const Common::RenderModeDescription *rm = Common::g_renderModes;
 	for (; rm->code; ++rm) {
-		_renderModePopUp->appendEntry(rm->description, rm->id);
+		_renderModePopUp->appendEntry(_(rm->description), rm->id);
 	}
 
 	// Fullscreen checkbox
-	_fullscreenCheckbox = new CheckboxWidget(boss, prefix + "grFullscreenCheckbox", "Fullscreen mode", 0, 0);
+	_fullscreenCheckbox = new CheckboxWidget(boss, prefix + "grFullscreenCheckbox", _("Fullscreen mode"), 0, 0);
 
 	// Aspect ratio checkbox
-	_aspectCheckbox = new CheckboxWidget(boss, prefix + "grAspectCheckbox", "Aspect ratio correction", 0, 0);
+	_aspectCheckbox = new CheckboxWidget(boss, prefix + "grAspectCheckbox", _("Aspect ratio correction"), 0, 0);
 
 	_enableGraphicSettings = true;
 }
 
 void OptionsDialog::addAudioControls(GuiObject *boss, const Common::String &prefix) {
 	// The MIDI mode popup & a label
-	_midiPopUpDesc = new StaticTextWidget(boss, prefix + "auMidiPopupDesc", "Music driver:");
+	_midiPopUpDesc = new StaticTextWidget(boss, prefix + "auMidiPopupDesc", _("Music driver:"));
 	_midiPopUp = new PopUpWidget(boss, prefix + "auMidiPopup");
 
 	// Populate it
 	const MidiDriverDescription *md = MidiDriver::getAvailableMidiDrivers();
 	while (md->name) {
-		_midiPopUp->appendEntry(md->description, md->id);
+		_midiPopUp->appendEntry(_(md->description), md->id);
 		md++;
 	}
 
 	// The OPL emulator popup & a label
-	_oplPopUpDesc = new StaticTextWidget(boss, prefix + "auOPLPopupDesc", "AdLib emulator:");
+	_oplPopUpDesc = new StaticTextWidget(boss, prefix + "auOPLPopupDesc", _("AdLib emulator:"));
 	_oplPopUp = new PopUpWidget(boss, prefix + "auOPLPopup");
 
 	// Populate it
 	const OPL::Config::EmulatorDescription *ed = OPL::Config::getAvailable();
 	while (ed->name) {
-		_oplPopUp->appendEntry(ed->description, ed->id);
+		_oplPopUp->appendEntry(_(ed->description), ed->id);
 		++ed;
 	}
 
 	// Sample rate settings
-	_outputRatePopUpDesc = new StaticTextWidget(boss, prefix + "auSampleRatePopupDesc", "Output rate:");
+	_outputRatePopUpDesc = new StaticTextWidget(boss, prefix + "auSampleRatePopupDesc", _("Output rate:"));
 	_outputRatePopUp = new PopUpWidget(boss, prefix + "auSampleRatePopup");
 
 	for (int i = 0; outputRateLabels[i]; i++) {
-		_outputRatePopUp->appendEntry(outputRateLabels[i], outputRateValues[i]);
+		_outputRatePopUp->appendEntry(_(outputRateLabels[i]), outputRateValues[i]);
 	}
 
 	_enableAudioSettings = true;
@@ -656,21 +657,21 @@ void OptionsDialog::addAudioControls(GuiObject *boss, const Common::String &pref
 
 void OptionsDialog::addMIDIControls(GuiObject *boss, const Common::String &prefix) {
 	// SoundFont
-	_soundFontButton = new ButtonWidget(boss, prefix + "mcFontButton", "SoundFont:", kChooseSoundFontCmd, 0);
-	_soundFont = new StaticTextWidget(boss, prefix + "mcFontPath", "None");
+	_soundFontButton = new ButtonWidget(boss, prefix + "mcFontButton", _("SoundFont:"), kChooseSoundFontCmd, 0);
+	_soundFont = new StaticTextWidget(boss, prefix + "mcFontPath", _("None"));
 	_soundFontClearButton = new ButtonWidget(boss, prefix + "mcFontClearButton", "C", kClearSoundFontCmd, 0);
 
 	// Multi midi setting
-	_multiMidiCheckbox = new CheckboxWidget(boss, prefix + "mcMixedCheckbox", "Mixed AdLib/MIDI mode", 0, 0);
+	_multiMidiCheckbox = new CheckboxWidget(boss, prefix + "mcMixedCheckbox", _("Mixed AdLib/MIDI mode"), 0, 0);
 
 	// Native mt32 setting
-	_mt32Checkbox = new CheckboxWidget(boss, prefix + "mcMt32Checkbox", "True Roland MT-32 (disable GM emulation)", 0, 0);
+	_mt32Checkbox = new CheckboxWidget(boss, prefix + "mcMt32Checkbox", _("True Roland MT-32 (disable GM emulation)"), 0, 0);
 
 	// GS Extensions setting
-	_enableGSCheckbox = new CheckboxWidget(boss, prefix + "mcGSCheckbox", "Enable Roland GS Mode", 0, 0);
+	_enableGSCheckbox = new CheckboxWidget(boss, prefix + "mcGSCheckbox", _("Enable Roland GS Mode"), 0, 0);
 
 	// MIDI gain setting (FluidSynth uses this)
-	_midiGainDesc = new StaticTextWidget(boss, prefix + "mcMidiGainText", "MIDI gain:");
+	_midiGainDesc = new StaticTextWidget(boss, prefix + "mcMidiGainText", _("MIDI gain:"));
 	_midiGainSlider = new SliderWidget(boss, prefix + "mcMidiGainSlider", kMidiGainChanged);
 	_midiGainSlider->setMinValue(0);
 	_midiGainSlider->setMaxValue(1000);
@@ -683,11 +684,11 @@ void OptionsDialog::addMIDIControls(GuiObject *boss, const Common::String &prefi
 // make use of the widgets. The launcher range is 0-255. SCUMM's 0-9
 void OptionsDialog::addSubtitleControls(GuiObject *boss, const Common::String &prefix, int maxSliderVal) {
 
-	_subToggleDesc = new StaticTextWidget(boss, prefix + "subToggleDesc", "Text and Speech:");
+	_subToggleDesc = new StaticTextWidget(boss, prefix + "subToggleDesc", _("Text and Speech:"));
 	_subToggleButton = new ButtonWidget(boss, prefix + "subToggleButton", "", kSubtitleToggle, 0);
 
 	// Subtitle speed
-	_subSpeedDesc = new StaticTextWidget(boss, prefix + "subSubtitleSpeedDesc", "Subtitle speed:");
+	_subSpeedDesc = new StaticTextWidget(boss, prefix + "subSubtitleSpeedDesc", _("Subtitle speed:"));
 	_subSpeedSlider = new SliderWidget(boss, prefix + "subSubtitleSpeedSlider", kSubtitleSpeedChanged);
 	_subSpeedLabel = new StaticTextWidget(boss, prefix + "subSubtitleSpeedLabel", "100%");
 	_subSpeedSlider->setMinValue(0); _subSpeedSlider->setMaxValue(maxSliderVal);
@@ -699,24 +700,24 @@ void OptionsDialog::addSubtitleControls(GuiObject *boss, const Common::String &p
 void OptionsDialog::addVolumeControls(GuiObject *boss, const Common::String &prefix) {
 
 	// Volume controllers
-	_musicVolumeDesc = new StaticTextWidget(boss, prefix + "vcMusicText", "Music volume:");
+	_musicVolumeDesc = new StaticTextWidget(boss, prefix + "vcMusicText", _("Music volume:"));
 	_musicVolumeSlider = new SliderWidget(boss, prefix + "vcMusicSlider", kMusicVolumeChanged);
 	_musicVolumeLabel = new StaticTextWidget(boss, prefix + "vcMusicLabel", "100%");
 	_musicVolumeSlider->setMinValue(0);
 	_musicVolumeSlider->setMaxValue(Audio::Mixer::kMaxMixerVolume);
 	_musicVolumeLabel->setFlags(WIDGET_CLEARBG);
 
-	_muteCheckbox = new CheckboxWidget(boss, prefix + "vcMuteCheckbox", "Mute All", kMuteAllChanged, 0);
+	_muteCheckbox = new CheckboxWidget(boss, prefix + "vcMuteCheckbox", _("Mute All"), kMuteAllChanged, 0);
 
 
-	_sfxVolumeDesc = new StaticTextWidget(boss, prefix + "vcSfxText", "SFX volume:");
+	_sfxVolumeDesc = new StaticTextWidget(boss, prefix + "vcSfxText", _("SFX volume:"));
 	_sfxVolumeSlider = new SliderWidget(boss, prefix + "vcSfxSlider", kSfxVolumeChanged);
 	_sfxVolumeLabel = new StaticTextWidget(boss, prefix + "vcSfxLabel", "100%");
 	_sfxVolumeSlider->setMinValue(0);
 	_sfxVolumeSlider->setMaxValue(Audio::Mixer::kMaxMixerVolume);
 	_sfxVolumeLabel->setFlags(WIDGET_CLEARBG);
 
-	_speechVolumeDesc = new StaticTextWidget(boss, prefix + "vcSpeechText" , "Speech volume:");
+	_speechVolumeDesc = new StaticTextWidget(boss, prefix + "vcSpeechText" , _("Speech volume:"));
 	_speechVolumeSlider = new SliderWidget(boss, prefix + "vcSpeechSlider", kSpeechVolumeChanged);
 	_speechVolumeLabel = new StaticTextWidget(boss, prefix + "vcSpeechLabel", "100%");
 	_speechVolumeSlider->setMinValue(0);
@@ -745,7 +746,7 @@ int OptionsDialog::getSubtitleMode(bool subtitles, bool speech_mute) {
 
 void OptionsDialog::reflowLayout() {
 	if (_graphicsTabId != -1 && _tabWidget)
-		_tabWidget->setTabTitle(_graphicsTabId, g_system->getOverlayWidth() > 320 ? "Graphics" : "GFX");
+		_tabWidget->setTabTitle(_graphicsTabId, g_system->getOverlayWidth() > 320 ? _("Graphics") : _("GFX"));
 
 	Dialog::reflowLayout();
 }
@@ -762,17 +763,17 @@ GlobalOptionsDialog::GlobalOptionsDialog()
 	//
 	// 1) The graphics tab
 	//
-	_graphicsTabId = tab->addTab(g_system->getOverlayWidth() > 320 ? "Graphics" : "GFX");
+	_graphicsTabId = tab->addTab(g_system->getOverlayWidth() > 320 ? _("Graphics") : _("GFX"));
 	addGraphicControls(tab, "GlobalOptions_Graphics.");
 
 	//
 	// 2) The audio tab
 	//
-	tab->addTab("Audio");
+	tab->addTab(_("Audio"));
 	addAudioControls(tab, "GlobalOptions_Audio.");
 	addSubtitleControls(tab, "GlobalOptions_Audio.");
 
-	tab->addTab("Volume");
+	tab->addTab(_("Volume"));
 	addVolumeControls(tab, "GlobalOptions_Volume.");
 
 	// TODO: cd drive setting
@@ -780,67 +781,85 @@ GlobalOptionsDialog::GlobalOptionsDialog()
 	//
 	// 3) The MIDI tab
 	//
-	tab->addTab("MIDI");
+	tab->addTab(_("MIDI"));
 	addMIDIControls(tab, "GlobalOptions_MIDI.");
 
 	//
 	// 4) The miscellaneous tab
 	//
-	tab->addTab("Paths");
+	tab->addTab(_("Paths"));
 
 #if !( defined(__DC__) || defined(__GP32__) )
 	// These two buttons have to be extra wide, or the text will be
 	// truncated in the small version of the GUI.
 
 	// Save game path
-	new ButtonWidget(tab, "GlobalOptions_Paths.SaveButton", "Save Path: ", kChooseSaveDirCmd, 0);
+	new ButtonWidget(tab, "GlobalOptions_Paths.SaveButton", _("Save Path: "), kChooseSaveDirCmd, 0);
 	_savePath = new StaticTextWidget(tab, "GlobalOptions_Paths.SavePath", "/foo/bar");
 
-	new ButtonWidget(tab, "GlobalOptions_Paths.ThemeButton", "Theme Path:", kChooseThemeDirCmd, 0);
-	_themePath = new StaticTextWidget(tab, "GlobalOptions_Paths.ThemePath", "None");
+	new ButtonWidget(tab, "GlobalOptions_Paths.ThemeButton", _("Theme Path:"), kChooseThemeDirCmd, 0);
+	_themePath = new StaticTextWidget(tab, "GlobalOptions_Paths.ThemePath", _("None"));
 
-	new ButtonWidget(tab, "GlobalOptions_Paths.ExtraButton", "Extra Path:", kChooseExtraDirCmd, 0);
-	_extraPath = new StaticTextWidget(tab, "GlobalOptions_Paths.ExtraPath", "None");
+	new ButtonWidget(tab, "GlobalOptions_Paths.ExtraButton", _("Extra Path:"), kChooseExtraDirCmd, 0);
+	_extraPath = new StaticTextWidget(tab, "GlobalOptions_Paths.ExtraPath", _("None"));
 
 #ifdef DYNAMIC_MODULES
-	new ButtonWidget(tab, "GlobalOptions_Paths.PluginsButton", "Plugins Path:", kChoosePluginsDirCmd, 0);
-	_pluginsPath = new StaticTextWidget(tab, "GlobalOptions_Paths.PluginsPath", "None");
+	new ButtonWidget(tab, "GlobalOptions_Paths.PluginsButton", _("Plugins Path:"), kChoosePluginsDirCmd, 0);
+	_pluginsPath = new StaticTextWidget(tab, "GlobalOptions_Paths.PluginsPath", _("None"));
 #endif
 #endif
 
-	tab->addTab("Misc");
+	tab->addTab(_("Misc"));
 
-	new ButtonWidget(tab, "GlobalOptions_Misc.ThemeButton", "Theme:", kChooseThemeCmd, 0);
+	new ButtonWidget(tab, "GlobalOptions_Misc.ThemeButton", _("Theme:"), kChooseThemeCmd, 0);
 	_curTheme = new StaticTextWidget(tab, "GlobalOptions_Misc.CurTheme", g_gui.theme()->getThemeName());
 
 
-	_rendererPopUpDesc = new StaticTextWidget(tab, "GlobalOptions_Misc.RendererPopupDesc", "GUI Renderer:");
+	_rendererPopUpDesc = new StaticTextWidget(tab, "GlobalOptions_Misc.RendererPopupDesc", _("GUI Renderer:"));
 	_rendererPopUp = new PopUpWidget(tab, "GlobalOptions_Misc.RendererPopup");
 
 	for (uint i = 1; i < GUI::ThemeEngine::_rendererModesSize; ++i)
-		_rendererPopUp->appendEntry(GUI::ThemeEngine::_rendererModes[i].name, GUI::ThemeEngine::_rendererModes[i].mode);
+		_rendererPopUp->appendEntry(_(GUI::ThemeEngine::_rendererModes[i].name), GUI::ThemeEngine::_rendererModes[i].mode);
 
-	_autosavePeriodPopUpDesc = new StaticTextWidget(tab, "GlobalOptions_Misc.AutosavePeriodPopupDesc", "Autosave:");
+	_autosavePeriodPopUpDesc = new StaticTextWidget(tab, "GlobalOptions_Misc.AutosavePeriodPopupDesc", _("Autosave:"));
 	_autosavePeriodPopUp = new PopUpWidget(tab, "GlobalOptions_Misc.AutosavePeriodPopup");
 
 	for (int i = 0; savePeriodLabels[i]; i++) {
-		_autosavePeriodPopUp->appendEntry(savePeriodLabels[i], savePeriodValues[i]);
+		_autosavePeriodPopUp->appendEntry(_(savePeriodLabels[i]), savePeriodValues[i]);
 	}
 
 #ifdef SMALL_SCREEN_DEVICE
-	new ButtonWidget(tab, "GlobalOptions_Misc.KeysButton", "Keys", kChooseKeyMappingCmd, 0);
+	new ButtonWidget(tab, "GlobalOptions_Misc.KeysButton", _("Keys"), kChooseKeyMappingCmd, 0);
 #endif
 
 	// TODO: joystick setting
 
 
+#ifdef TRANSLATION
+	_guiLanguagePopUpDesc = new StaticTextWidget(tab, "GlobalOptions_Misc.GuiLanguagePopupDesc", _("Language:"));
+	_guiLanguagePopUp = new PopUpWidget(tab, "GlobalOptions_Misc.GuiLanguagePopup");
+#ifdef DETECTLANG
+	_guiLanguagePopUp->appendEntry(_("<default>"), Common::kTranslationAutodetectId);
+#endif // DETECTLANG
+	_guiLanguagePopUp->appendEntry(_("English"), Common::kTranslationBuiltinId);
+	_guiLanguagePopUp->appendEntry("", 0);
+	Common::TLangArray languages = TransMan.getSupportedLanguages();
+	Common::TLangArray::iterator lang = languages.begin();
+	while (lang != languages.end()) {
+		_guiLanguagePopUp->appendEntry(lang->name, lang->id);
+		lang++;
+	}
+	_guiLanguagePopUp->setSelectedTag(TransMan.parseLanguage(ConfMan.get("gui_language").c_str()));
+
+#endif // TRANSLATION
+
 	// Activate the first tab
 	tab->setActiveTab(0);
 	_tabWidget = tab;
 
 	// Add OK & Cancel buttons
-	new ButtonWidget(this, "GlobalOptions.Cancel", "Cancel", kCloseCmd, 0);
-	new ButtonWidget(this, "GlobalOptions.Ok", "OK", kOKCmd, 0);
+	new ButtonWidget(this, "GlobalOptions.Cancel", _("Cancel"), kCloseCmd, 0);
+	new ButtonWidget(this, "GlobalOptions.Ok", _("OK"), kOKCmd, 0);
 
 #ifdef SMALL_SCREEN_DEVICE
 	_keysDialog = new KeysDialog();
@@ -863,19 +882,19 @@ void GlobalOptionsDialog::open() {
 	Common::String extraPath(ConfMan.get("extrapath", _domain));
 
 	if (savePath.empty() || !ConfMan.hasKey("savepath", _domain)) {
-		_savePath->setLabel("None");
+		_savePath->setLabel(_("None"));
 	} else {
 		_savePath->setLabel(savePath);
 	}
 
 	if (themePath.empty() || !ConfMan.hasKey("themepath", _domain)) {
-		_themePath->setLabel("None");
+		_themePath->setLabel(_("None"));
 	} else {
 		_themePath->setLabel(themePath);
 	}
 
 	if (extraPath.empty() || !ConfMan.hasKey("extrapath", _domain)) {
-		_extraPath->setLabel("None");
+		_extraPath->setLabel(_("None"));
 	} else {
 		_extraPath->setLabel(extraPath);
 	}
@@ -883,7 +902,7 @@ void GlobalOptionsDialog::open() {
 #ifdef DYNAMIC_MODULES
 	Common::String pluginsPath(ConfMan.get("pluginspath", _domain));
 	if (pluginsPath.empty() || !ConfMan.hasKey("pluginspath", _domain)) {
-		_pluginsPath->setLabel("None");
+		_pluginsPath->setLabel(_("None"));
 	} else {
 		_pluginsPath->setLabel(pluginsPath);
 	}
@@ -907,24 +926,24 @@ void GlobalOptionsDialog::open() {
 void GlobalOptionsDialog::close() {
 	if (getResult()) {
 		Common::String savePath(_savePath->getLabel());
-		if (!savePath.empty() && (savePath != "None"))
+		if (!savePath.empty() && (savePath != _("None")))
 			ConfMan.set("savepath", savePath, _domain);
 
 		Common::String themePath(_themePath->getLabel());
-		if (!themePath.empty() && (themePath != "None"))
+		if (!themePath.empty() && (themePath != _("None")))
 			ConfMan.set("themepath", themePath, _domain);
 		else
 			ConfMan.removeKey("themepath", _domain);
 
 		Common::String extraPath(_extraPath->getLabel());
-		if (!extraPath.empty() && (extraPath != "None"))
+		if (!extraPath.empty() && (extraPath != _("None")))
 			ConfMan.set("extrapath", extraPath, _domain);
 		else
 			ConfMan.removeKey("extrapath", _domain);
 
 #ifdef DYNAMIC_MODULES
 		Common::String pluginsPath(_pluginsPath->getLabel());
-		if (!pluginsPath.empty() && (pluginsPath != "None"))
+		if (!pluginsPath.empty() && (pluginsPath != _("None")))
 			ConfMan.set("pluginspath", pluginsPath, _domain);
 		else
 			ConfMan.removeKey("pluginspath", _domain);
@@ -940,6 +959,28 @@ void GlobalOptionsDialog::close() {
 			g_gui.loadNewTheme(g_gui.theme()->getThemeId(), selected);
 			ConfMan.set("gui_renderer", cfg, _domain);
 		}
+#ifdef TRANSLATION
+		Common::String oldLang = ConfMan.get("gui_language");
+		int selLang = _guiLanguagePopUp->getSelectedTag();
+
+		ConfMan.set("gui_language", TransMan.getLangById(selLang));
+
+		Common::String newLang = ConfMan.get("gui_language").c_str();
+		if (newLang != oldLang) {
+#if 0
+			// Activate the selected language
+			TransMan.setLanguage(selLang);
+
+			// FIXME: Actually, any changes (including the theme change) should
+			// only become active *after* the options dialog has closed.
+			g_gui.loadNewTheme(g_gui.theme()->getThemeId(), ThemeEngine::kGfxDisabled, true);
+#else
+			MessageDialog error(_("You have to restart ScummVM to take the effect."));
+			error.runModal();
+#endif
+		}
+#endif // TRANSLATION
+
 	}
 	OptionsDialog::close();
 }
@@ -947,14 +988,14 @@ void GlobalOptionsDialog::close() {
 void GlobalOptionsDialog::handleCommand(CommandSender *sender, uint32 cmd, uint32 data) {
 	switch (cmd) {
 	case kChooseSaveDirCmd: {
-		BrowserDialog browser("Select directory for savegames", true);
+		BrowserDialog browser(_("Select directory for savegames"), true);
 		if (browser.runModal() > 0) {
 			// User made his choice...
 			Common::FSNode dir(browser.getResult());
 			if (dir.isWritable()) {
 				_savePath->setLabel(dir.getPath());
 			} else {
-				MessageDialog error("The chosen directory cannot be written to. Please select another one.");
+				MessageDialog error(_("The chosen directory cannot be written to. Please select another one."));
 				error.runModal();
 				return;
 			}
@@ -963,7 +1004,7 @@ void GlobalOptionsDialog::handleCommand(CommandSender *sender, uint32 cmd, uint3
 		break;
 	}
 	case kChooseThemeDirCmd: {
-		BrowserDialog browser("Select directory for GUI themes", true);
+		BrowserDialog browser(_("Select directory for GUI themes"), true);
 		if (browser.runModal() > 0) {
 			// User made his choice...
 			Common::FSNode dir(browser.getResult());
@@ -973,7 +1014,7 @@ void GlobalOptionsDialog::handleCommand(CommandSender *sender, uint32 cmd, uint3
 		break;
 	}
 	case kChooseExtraDirCmd: {
-		BrowserDialog browser("Select directory for extra files", true);
+		BrowserDialog browser(_("Select directory for extra files"), true);
 		if (browser.runModal() > 0) {
 			// User made his choice...
 			Common::FSNode dir(browser.getResult());
@@ -984,7 +1025,7 @@ void GlobalOptionsDialog::handleCommand(CommandSender *sender, uint32 cmd, uint3
 	}
 #ifdef DYNAMIC_MODULES
 	case kChoosePluginsDirCmd: {
-		BrowserDialog browser("Select directory for plugins", true);
+		BrowserDialog browser(_("Select directory for plugins"), true);
 		if (browser.runModal() > 0) {
 			// User made his choice...
 			Common::FSNode dir(browser.getResult());
@@ -995,13 +1036,13 @@ void GlobalOptionsDialog::handleCommand(CommandSender *sender, uint32 cmd, uint3
 	}
 #endif
 	case kChooseSoundFontCmd: {
-		BrowserDialog browser("Select SoundFont", false);
+		BrowserDialog browser(_("Select SoundFont"), false);
 		if (browser.runModal() > 0) {
 			// User made his choice...
 			Common::FSNode file(browser.getResult());
 			_soundFont->setLabel(file.getPath());
 
-			if (!file.getPath().empty() && (file.getPath() != "None"))
+			if (!file.getPath().empty() && (file.getPath() != _("None")))
 				_soundFontClearButton->setEnabled(true);
 			else
 				_soundFontClearButton->setEnabled(false);