diff --git a/data/en.mse-locale/locale b/data/en.mse-locale/locale
index 8203cdd5..5d413968 100644
--- a/data/en.mse-locale/locale
+++ b/data/en.mse-locale/locale
@@ -207,7 +207,7 @@ help:
 	overlap:			Place this shape, and its border above shapes below it
 	border:				Draws this shape as a border
 	
-	drag to shear:		Drag to shear selected shape
+	drag to shear:		Drag to shear selected %s
 	drag to rotate:		Drag to rotate selected %s, Ctrl constrains angle to multiples of 15 degrees
 	drag to resize:		Drag to resize selected %s, Ctrl constrains size
 	click to select shape:	Click to select shape, drag to move shape, double click to edit shape
@@ -421,7 +421,7 @@ label:
 	
 	# apprentice export
 	set code:			Set &Code:
-	apprentice export cancled: Export to Apprentice is cancled
+	apprentice export cancelled: Export to Apprentice is cancelled
 	
 	# Html export
 	html template:		Template:
@@ -516,7 +516,7 @@ title:
 	print preview:		Print Preview
 	# export
 	export images:		Export Images
-	export cancled:		Export Cancled
+	export cancelled:	Export Cancelled
 	export html:		Export to HTML
 	save html:			Export to HTML
 	
@@ -530,8 +530,13 @@ title:
 action:
 	# Text editor
 	typing:				Typing
+	enter:				Enter
+	soft line break:	Soft line break
+	insert symbol:		Insert symbol
 	backspace:			Backspace
 	delete:				Delete
+	cut:				Cut
+	paste:				Paste
 	# Choice/color editors
 	change:				Change %s
 	
@@ -561,7 +566,7 @@ action:
 	
 	# Symmetry
 	add symmetry:			Add symmetry
-	remove symmetry:		Remove symmetry
+	#remove symmetry:		Remove symmetry
 	move symmetry center:	Move symmetry center
 	move symmetry handle:	Change symmetry orientation
 	change symmetry type:	Change symmetry type
@@ -597,7 +602,6 @@ error:
 	has no member value:		String "%s" has no member '%s'
 	can't convert value:		Can't convert "%s" from %s to %s
 	unsupported format:			Invalid string format: '%s'
-	can not sort:				I don't know how to sort a %s
 	
 	# Image stuff
 	coordinates for blending overlap:					Coordinates for blending overlap
@@ -638,7 +642,7 @@ type:
 	collection:		collection
 	collection of:	collection of %ss
 	object:			object
-	real:			real number
+	double:			real number
 	integer:		integer number
 	string:			string
 	boolean:		boolean
@@ -675,7 +679,6 @@ type:
 	
 	point:			point
 	points:			points
-	handle:			handle
 	
 	# Package manager
 	installed:		installed
diff --git a/src/data/field.cpp b/src/data/field.cpp
index 807084ed..28ed6311 100644
--- a/src/data/field.cpp
+++ b/src/data/field.cpp
@@ -82,7 +82,7 @@ intrusive_ptr<Field> read_new<Field>(Reader& reader) {
 		reader.warning(_ERROR_1_("expected key", _("type")));
 		throw ParseError(_ERROR_("aborting parsing"));
 	} else {
-		reader.warning(_ERROR_1_("Unsupported field type", type));
+		reader.warning(_ERROR_1_("unsupported field type", type));
 		throw ParseError(_ERROR_("aborting parsing"));
 	}
 }
diff --git a/src/data/format/apprentice.cpp b/src/data/format/apprentice.cpp
index 164934b0..5316f787 100644
--- a/src/data/format/apprentice.cpp
+++ b/src/data/format/apprentice.cpp
@@ -697,7 +697,7 @@ void ApprenticeExportWindow::onOk(wxCommandEvent& ev) {
 		}
 	} catch (const AbortException&) {
 		// aborted, cleanup is already handled by dtors
-		wxMessageBox(_LABEL_("apprentice export cancled"), _TITLE_("export canceled"), wxOK | wxICON_INFORMATION);
+		wxMessageBox(_LABEL_("apprentice export cancelled"), _TITLE_("export cancelled"), wxOK | wxICON_INFORMATION);
 	}
 	// Done, close progress window
 	progress_target->Hide();
diff --git a/src/data/locale.cpp b/src/data/locale.cpp
index c039dcba..9dca1de0 100644
--- a/src/data/locale.cpp
+++ b/src/data/locale.cpp
@@ -13,6 +13,11 @@
 #include <util/io/package_manager.hpp>
 #include <script/to_value.hpp>
 
+#include <wx/stdpaths.h>
+#if defined(__WXMSW__)
+	#include <wx/mstream.h>
+#endif
+
 // ----------------------------------------------------------------------------- : Locale class
 
 LocaleP the_locale;
@@ -109,3 +114,148 @@ String tr(const SymbolFont& f, const String& key, const String& def) {
 	if (!loc)        return def; // no information on this symbol font
 	return loc->tr(key, def);
 }
+
+// ----------------------------------------------------------------------------- : Validation
+
+DECLARE_POINTER_TYPE(SubLocaleValidator);
+
+class KeyValidator {
+  public:
+	int  args;
+	bool optional;
+	DECLARE_REFLECTION();
+};
+
+class SubLocaleValidator : public IntrusivePtrBase<SubLocaleValidator> {
+  public:
+	map<String,KeyValidator> keys; ///< Arg count for each key
+	DECLARE_REFLECTION();
+};
+
+/// Validation information for locales
+class LocaleValidator {
+  public:
+	map<String, SubLocaleValidatorP> sublocales;
+	DECLARE_REFLECTION();
+};
+
+template <> void Reader::handle(KeyValidator& k) {
+	String v = getValue();
+	if (starts_with(v, _("optional, "))) {
+		k.optional = true;
+		v = v.substr(10);
+	} else {
+		k.optional = false;
+	}
+	long l = 0;
+	v.ToLong(&l);
+	k.args = l;
+}
+template <> void Writer::handle(const KeyValidator& v) {
+	assert(false);
+}
+IMPLEMENT_REFLECTION_NO_SCRIPT(SubLocaleValidator) {
+	REFLECT_NAMELESS(keys);
+}
+IMPLEMENT_REFLECTION_NO_SCRIPT(LocaleValidator) {
+	REFLECT_NAMELESS(sublocales);
+}
+
+/// Count "%s" in str
+int string_format_args(const String& str) {
+	int count = 0;
+	bool in_percent = false;
+	FOR_EACH_CONST(c, str) {
+		if (in_percent) {
+			if (c == _('s')) {
+				count++;
+			}
+			in_percent = false;
+		} else if (c == _('%')) {
+			in_percent = true;
+		}
+	}
+	return count;
+}
+
+/// Load a text file from a resource
+/** TODO: Move me
+ */
+InputStreamP load_resource_text(const String& name);
+InputStreamP load_resource_text(const String& name) {
+	#if defined(__WXMSW__)
+		HRSRC hResource = ::FindResource(wxGetInstance(), name, _("TEXT"));
+		if ( hResource == 0 ) throw InternalError(String::Format(_("Resource not found: %s"), name));
+		HGLOBAL hData = ::LoadResource(wxGetInstance(), hResource);
+		if ( hData == 0 ) throw InternalError(String::Format(_("Resource not text: %s"), name));
+		char* data = (char *)::LockResource(hData);
+		if ( !data ) throw InternalError(String::Format(_("Resource cannot be locked: %s"), name));
+		int len = ::SizeofResource(wxGetInstance(), hResource);
+		return new_shared2<wxMemoryInputStream>(data, len);
+	#else
+		static String path = wxStandardPaths::Get().GetDataDir() + _("/resource/") + name;
+		return new_shared1<wxFileInputStream>(path);
+	#endif
+}
+
+
+DECLARE_TYPEOF(map<String COMMA String>);
+DECLARE_TYPEOF(map<String COMMA KeyValidator>);
+
+void Locale::validate(Version ver) {
+	// load locale validator
+	LocaleValidator v;
+	Reader r(load_resource_text(_("expected_locale_keys")), _("expected_locale_keys"));
+	r.handle_greedy(v);
+	// validate
+	String errors;
+	errors += translations[LOCALE_CAT_MENU   ].validate(_("menu"),    *v.sublocales[_("menu")   ]);
+	errors += translations[LOCALE_CAT_HELP   ].validate(_("help"),    *v.sublocales[_("help")   ]);
+	errors += translations[LOCALE_CAT_TOOL   ].validate(_("tool"),    *v.sublocales[_("tool")   ]);
+	errors += translations[LOCALE_CAT_TOOLTIP].validate(_("tooltip"), *v.sublocales[_("tooltip")]);
+	errors += translations[LOCALE_CAT_LABEL  ].validate(_("label"),   *v.sublocales[_("label")  ]);
+	errors += translations[LOCALE_CAT_BUTTON ].validate(_("button"),  *v.sublocales[_("button") ]);
+	errors += translations[LOCALE_CAT_TITLE  ].validate(_("title"),   *v.sublocales[_("title")  ]);
+	errors += translations[LOCALE_CAT_ACTION ].validate(_("action"),  *v.sublocales[_("action") ]);
+	errors += translations[LOCALE_CAT_ERROR  ].validate(_("error"),   *v.sublocales[_("error")  ]);
+	errors += translations[LOCALE_CAT_TYPE   ].validate(_("type"),    *v.sublocales[_("type")   ]);
+	// errors?
+	if (!errors.empty()) {
+		if (ver != app_version) {
+			errors = _("Errors in locale file ") + short_name + _(":") + errors;
+		} else {
+			errors = _("Errors in locale file ") + short_name +
+			         _("\nThis is probably because the locale was made for a different version of MSE.") + errors;
+		}
+		handle_warning(errors);
+	}
+}
+
+String SubLocale::validate(const String& name, const SubLocaleValidator& v) const {
+	String errors;
+	// 1. keys in v but not in this, check arg count
+	FOR_EACH_CONST(kc, v.keys) {
+		map<String,String>::const_iterator it = translations.find(kc.first);
+		if (it == translations.end()) {
+			if (!kc.second.optional) {
+				errors += _("\n   Missing key:\t\t\t") + name + _(": ") + kc.first;
+			}
+		} else if (string_format_args(it->second) != kc.second.args) {
+			errors += _("\n   Incorrect number of arguments for:\t") + name + _(": ") + kc.first
+			       +  String::Format(_("\t  expected: %d, found %d"), kc.second.args, string_format_args(it->second));
+		}
+	}
+	// 2. keys in this but not in v
+	FOR_EACH_CONST(kv, translations) {
+		map<String,KeyValidator>::const_iterator it = v.keys.find(kv.first);
+		if (it == v.keys.end() && !kv.second.empty()) {
+			// allow extra keys with empty values as a kind of documentation
+			// for example in the help stirngs:
+			//   help:
+			//       file:
+			//       new set: blah blah
+			errors += _("\n   Unexpected key:\t\t\t") + name + _(": ") + kv.first;
+		}
+	}
+	return errors;
+}
diff --git a/src/data/locale.hpp b/src/data/locale.hpp
index b92d3015..2de66934 100644
--- a/src/data/locale.hpp
+++ b/src/data/locale.hpp
@@ -16,6 +16,7 @@
 
 DECLARE_POINTER_TYPE(Locale);
 DECLARE_POINTER_TYPE(SubLocale);
+class SubLocaleValidator;
 
 // ----------------------------------------------------------------------------- : Locale class
 
@@ -29,6 +30,9 @@ class SubLocale : public IntrusivePtrBase<SubLocale> {
 	/// Translate a key with a default value
 	String tr(const String& key, const String& def);
 	
+	/// Is this a valid sublocale? Returns errors
+	String validate(const String& name, const SubLocaleValidator&) const;
+	
 	DECLARE_REFLECTION();
 };
 
@@ -47,6 +51,9 @@ class Locale : public Packaged {
 	/// Open a locale with the given name
 	static LocaleP byName(const String& name);
 	
+	/// Validate that the locale is valid for this MSE version
+	virtual void validate(Version = app_version);
+	
   protected:
 	String typeName() const;
 	DECLARE_REFLECTION();
diff --git a/src/gui/control/keyword_list.hpp b/src/gui/control/keyword_list.hpp
index 6a73ae8c..a7ab81d9 100644
--- a/src/gui/control/keyword_list.hpp
+++ b/src/gui/control/keyword_list.hpp
@@ -70,7 +70,7 @@ class KeywordList : public ItemList, public SetView {
 	
 	/// Send an 'item selected' event for the currently selected item (selected_item)
 	virtual void sendEvent();
-	/// Compare cards
+	/// Compare keywords
 	virtual bool compareItems(void* a, void* b) const;
 	
 	/// Get the text of an item in a specific column
diff --git a/src/gui/set/window.cpp b/src/gui/set/window.cpp
index e19652a3..a2f2045d 100644
--- a/src/gui/set/window.cpp
+++ b/src/gui/set/window.cpp
@@ -141,7 +141,7 @@ SetWindow::SetWindow(Window* parent, const SetP& set)
 	addPanel(menuWindow, tabBar, new StylePanel   (this, wxID_ANY), 2, _("window_style"),      _("style tab"));
 	addPanel(menuWindow, tabBar, new KeywordsPanel(this, wxID_ANY), 3, _("window_keywords"),   _("keywords tab"));
 	addPanel(menuWindow, tabBar, new StatsPanel   (this, wxID_ANY), 4, _("window_statistics"), _("stats tab"));
-//	addPanel(*s, *menuWindow, *tabBar, new DraftPanel   (&this, wxID_ANY), 5, _("F10")) 
+//	addPanel(menuWindow, tabBar, new DraftPanel   (this, wxID_ANY), 5, _("window_draft"),      _("draft tab")) 
 	selectPanel(ID_WINDOW_CARDS); // select cards panel
 	
 	// loose ends
diff --git a/src/gui/value/text.cpp b/src/gui/value/text.cpp
index ca83717a..363a9499 100644
--- a/src/gui/value/text.cpp
+++ b/src/gui/value/text.cpp
@@ -177,7 +177,7 @@ bool TextValueEditor::onChar(wxKeyEvent& ev) {
 					return true;
 				}
 			}
-			replaceSelection(wxEmptyString, _("Backspace"));
+			replaceSelection(wxEmptyString, _ACTION_("backspace"));
 			break;
 		case WXK_DELETE:
 			if (selection_start == selection_end) {
@@ -188,15 +188,15 @@ bool TextValueEditor::onChar(wxKeyEvent& ev) {
 					moveSelection(TYPE_CURSOR, nextCharBoundry(selection_end), true, MOVE_RIGHT);
 				}
 			}
-			replaceSelection(wxEmptyString, _("Delete"));
+			replaceSelection(wxEmptyString, _ACTION_("delete"));
 			break;
 		case WXK_RETURN:
 			if (field().multi_line) {
 				if (ev.ShiftDown()) {
 					// soft line break
-					replaceSelection(_("<soft-line>\n</soft-line>"), _("Soft line break"));
+					replaceSelection(_("<soft-line>\n</soft-line>"), _ACTION_("soft line break"));
 				} else {
-					replaceSelection(_("\n"), _("Enter"));
+					replaceSelection(_("\n"), _ACTION_("enter"));
 				}
 			}
 			break;
@@ -212,9 +212,9 @@ bool TextValueEditor::onChar(wxKeyEvent& ev) {
 				//       this might not work for internationalized input.
 				//       It might also not be portable!
 				#ifdef UNICODE
-					replaceSelection(escape(String(ev.GetUnicodeKey(),    1)), _("Typing"));
+					replaceSelection(escape(String(ev.GetUnicodeKey(),    1)), _ACTION_("typing"));
 				#else
-					replaceSelection(escape(String((Char)ev.GetKeyCode(), 1)), _("Typing"));
+					replaceSelection(escape(String((Char)ev.GetKeyCode(), 1)), _ACTION_("typing"));
 				#endif
 			} else {
 				return false;
@@ -256,7 +256,7 @@ bool TextValueEditor::onCommand(int id) {
 			if (!style().always_symbol) {
 				code = _("<sym>") + code + _("</sym>");
 			}
-			replaceSelection(code, _("Insert Symbol"));
+			replaceSelection(code, _ACTION_("insert symbol"));
 			return true;
 		}
 	}
@@ -350,7 +350,7 @@ bool TextValueEditor::doPaste() {
 	wxTheClipboard->Close();
 	if (!ok) return false;
 	// paste
-	replaceSelection(escape(data.GetText()), _("Paste"));
+	replaceSelection(escape(data.GetText()), _ACTION_("paste"));
 	return true;
 }
 
@@ -370,7 +370,7 @@ bool TextValueEditor::doCopy() {
 }
 
 bool TextValueEditor::doDelete() {
-	replaceSelection(wxEmptyString, _("Cut"));
+	replaceSelection(wxEmptyString, _ACTION_("cut"));
 	return true;
 }
 
diff --git a/src/resource/common/expected_locale_keys b/src/resource/common/expected_locale_keys
new file mode 100644
index 00000000..5de49511
--- /dev/null
+++ b/src/resource/common/expected_locale_keys
@@ -0,0 +1,495 @@
+# This file contains the keys expected to be in MSE locales
+# It was automatically generated by tools/locale/locale.pl
+# Generated on Fri Aug 17 22:58:51 2007
+
+action:
+	add control point:	0
+	add part:	1
+	add symmetry:	0
+	backspace:	0
+	change:	1
+	change combine mode:	0
+	change shape name:	0
+	change symmetry copies:	0
+	change symmetry type:	0
+	convert to curve:	0
+	convert to line:	0
+	cut:	0
+	delete:	0
+	delete point:	0
+	delete points:	0
+	duplicate:	1
+	enter:	0
+	group parts:	0
+	insert symbol:	0
+	lock point:	0
+	move:	1
+	move curve:	0
+	move handle:	0
+	move symmetry center:	0
+	move symmetry handle:	0
+	paste:	0
+	remove parts:	1
+	reorder parts:	0
+	rotate:	1
+	scale:	1
+	shear:	1
+	soft line break:	0
+	typing:	0
+	ungroup parts:	0
+button:
+	always:	0
+	browse:	0
+	check now:	0
+	close:	0
+	edit symbol:	0
+	hide:	0
+	high quality:	0
+	if internet connection exists:	0
+	insert parameter:	0
+	keep old:	0
+	last opened set:	0
+	move down:	0
+	move up:	0
+	never:	0
+	new set:	0
+	number:	0
+	number overwrite:	0
+	open set:	0
+	overwrite:	0
+	refer parameter:	0
+	select:	optional, 0
+	select all:	0
+	select none:	0
+	show:	0
+	show lines:	0
+	symbol gallery:	optional, 0
+	use custom styling options:	0
+	use for all cards:	0
+	zoom export:	0
+error:
+	aborting parsing:	0
+	can't convert:	2
+	can't convert value:	3
+	checking updates:	0
+	checking updates failed:	0
+	coordinates for blending overlap:	0
+	dimension not found:	1
+	expected key:	1
+	file not found:	2
+	file parse error:	2
+	has no member:	2
+	has no member value:	2
+	images used for blending must have the same size:	0
+	internal error:	1
+	newer version:	2
+	no game specified for the set:	0
+	no packages:	0
+	no stylesheet specified for the set:	0
+	no updates:	0
+	package not found:	1
+	package out of date:	3
+	stylesheet and set refer to different game:	0
+	unable to open output file:	0
+	unable to store file:	0
+	unrecognized value:	1
+	unsupported field type:	1
+	unsupported fill type:	1
+	unsupported format:	1
+help:
+	about:	0
+	add card:	0
+	add cards:	0
+	add keyword:	0
+	add symmetry:	0
+	app language:	0
+	basic shapes:	0
+	bold:	0
+	border:	0
+	card list columns:	0
+	cards tab:	0
+	check updates:	0
+	click to select shape:	0
+	close symbol editor:	0
+	copies:	0
+	copy:	0
+	copy card:	0
+	copy keyword:	0
+	curve segment:	0
+	cut:	0
+	cut card:	0
+	cut keyword:	0
+	difference:	0
+	draft tab:	optional, 0
+	drag to draw shape:	0
+	drag to move curve:	0
+	drag to move line:	0
+	drag to move point:	0
+	drag to resize:	1
+	drag to rotate:	1
+	drag to shear:	1
+	draw ellipse:	0
+	draw polygon:	0
+	draw rectangle:	0
+	draw star:	0
+	duplicate:	0
+	ellipse:	0
+	exit:	0
+	export:	0
+	export apprentice:	0
+	export html:	0
+	export image:	0
+	export images:	0
+	export mws:	0
+	filename format:	0
+	free point:	0
+	grid:	0
+	group:	0
+	index:	0
+	intersect:	0
+	italic:	0
+	keywords tab:	0
+	last opened set:	1
+	line segment:	0
+	merge:	0
+	new set:	0
+	new symbol:	0
+	new window:	0
+	next card:	0
+	next keyword:	0
+	open set:	0
+	open symbol:	0
+	orientation:	0
+	overlap:	0
+	paint:	0
+	paste:	0
+	paste card:	0
+	paste keyword:	0
+	points:	0
+	polygon:	0
+	preferences:	0
+	previous card:	0
+	previous keyword:	0
+	print:	0
+	print preview:	0
+	rectangle:	0
+	redo:	0
+	reflection:	0
+	reload data:	0
+	reminder text:	0
+	remove card:	0
+	remove keyword:	0
+	remove symmetry:	0
+	rotate:	0
+	rotate 0:	0
+	rotate 180:	0
+	rotate 270:	0
+	rotate 90:	0
+	rotate card:	0
+	rotation:	0
+	save set:	0
+	save set as:	0
+	save symbol:	0
+	save symbol as:	0
+	select:	0
+	set code:	0
+	set info tab:	0
+	sides:	0
+	smooth point:	0
+	snap:	0
+	star:	0
+	stats tab:	0
+	store symbol:	0
+	style tab:	0
+	subtract:	0
+	symbols:	0
+	symmetric point:	0
+	symmetry:	0
+	undo:	0
+	ungroup:	0
+	website:	0
+	welcome:	0
+	zoom export:	0
+label:
+	app language:	0
+	apprentice:	0
+	apprentice exe:	0
+	apprentice export cancelled:	0
+	card display:	0
+	card notes:	0
+	cards to export:	0
+	check at startup:	0
+	checking requires internet:	0
+	columns:	0
+	export filenames:	0
+	external programs:	0
+	filename conflicts:	0
+	filename format:	0
+	filename is ignored:	0
+	filter:	0
+	game type:	0
+	html export options:	0
+	html template:	0
+	keyword:	0
+	language:	0
+	match:	0
+	mode:	0
+	original:	0
+	percent of normal:	0
+	reminder:	0
+	result:	0
+	save changes:	1
+	select cards print:	0
+	select columns:	0
+	selection:	0
+	set code:	0
+	sides:	optional, 0
+	size:	0
+	standard keyword:	1
+	style type:	0
+	styling options:	0
+	uses:	0
+	zoom:	0
+menu:
+	about:	0
+	add card:	0
+	add cards:	0
+	add keyword:	0
+	basic shapes:	0
+	bold:	0
+	card list columns:	0
+	cards:	0
+	cards tab:	0
+	check updates:	0
+	close symbol editor:	0
+	copy:	0
+	cut:	0
+	draft tab:	optional, 0
+	duplicate:	0
+	edit:	0
+	exit:	0
+	export:	0
+	export apprentice:	0
+	export html:	0
+	export image:	0
+	export images:	0
+	export mws:	0
+	file:	0
+	find:	0
+	find next:	0
+	format:	0
+	group:	0
+	help:	0
+	index:	0
+	insert symbol:	0
+	italic:	0
+	keywords:	0
+	keywords tab:	0
+	new set:	0
+	new symbol:	0
+	new window:	0
+	next card:	0
+	next keyword:	0
+	open set:	0
+	open symbol:	0
+	orientation:	0
+	paint:	0
+	paste:	0
+	points:	0
+	preferences:	0
+	previous card:	0
+	previous keyword:	0
+	print:	0
+	print preview:	0
+	redo:	1
+	reload data:	0
+	reminder text:	0
+	remove card:	0
+	remove keyword:	0
+	replace:	0
+	rotate:	0
+	rotate 0:	0
+	rotate 180:	0
+	rotate 270:	0
+	rotate 90:	0
+	save set:	0
+	save set as:	0
+	save symbol:	0
+	save symbol as:	0
+	select:	0
+	set info tab:	0
+	stats tab:	0
+	store symbol:	0
+	style tab:	0
+	symbols:	0
+	symmetry:	0
+	tool:	0
+	undo:	1
+	ungroup:	0
+	website:	0
+	window:	0
+title:
+	%s - magic set editor:	1
+	about:	0
+	directories:	0
+	display:	0
+	export cancelled:	0
+	export html:	0
+	export images:	0
+	global:	0
+	locate apprentice:	0
+	magic set editor:	0
+	new status:	0
+	open set:	0
+	package list:	0
+	package name:	0
+	package status:	0
+	preferences:	0
+	print preview:	0
+	save changes:	0
+	save html:	0
+	save image:	0
+	save set:	0
+	select cards:	0
+	select cards export:	0
+	select columns:	0
+	slice image:	0
+	symbol editor:	0
+	untitled:	0
+	update check:	0
+	updates:	0
+	updates availible:	0
+tool:
+	add symmetry:	0
+	basic shapes:	0
+	border:	0
+	cards tab:	0
+	curve segment:	0
+	difference:	0
+	draft tab:	optional, 0
+	ellipse:	0
+	free point:	0
+	grid:	0
+	intersect:	0
+	keywords tab:	0
+	line segment:	0
+	merge:	0
+	overlap:	0
+	paint:	optional, 0
+	points:	0
+	polygon:	0
+	rectangle:	0
+	redo:	0
+	reflection:	0
+	remove symmetry:	0
+	rotate:	0
+	rotation:	0
+	select:	0
+	set info tab:	0
+	smooth point:	0
+	snap:	0
+	star:	0
+	stats tab:	0
+	store symbol:	0
+	style tab:	0
+	subtract:	0
+	symmetric point:	0
+	symmetry:	0
+	undo:	0
+tooltip:
+	add card:	0
+	add keyword:	0
+	add symmetry:	0
+	basic shapes:	0
+	bold:	0
+	border:	0
+	cards tab:	0
+	copy:	0
+	curve segment:	0
+	cut:	0
+	difference:	0
+	draft tab:	optional, 0
+	ellipse:	0
+	export:	0
+	free point:	0
+	grid:	0
+	intersect:	0
+	italic:	0
+	keywords tab:	0
+	line segment:	0
+	merge:	0
+	new set:	0
+	open set:	0
+	overlap:	0
+	paint:	optional, 0
+	paste:	0
+	points:	0
+	polygon:	0
+	rectangle:	0
+	redo:	1
+	reflection:	0
+	reminder text:	0
+	remove card:	0
+	remove keyword:	0
+	remove symmetry:	0
+	rotate:	0
+	rotate card:	0
+	rotation:	0
+	save set:	0
+	select:	0
+	set info tab:	0
+	smooth point:	0
+	snap:	0
+	star:	0
+	stats tab:	0
+	store symbol:	0
+	style tab:	0
+	subtract:	0
+	symbols:	0
+	symmetric point:	0
+	symmetry:	0
+	undo:	1
+type:
+	boolean:	0
+	card:	0
+	circle:	0
+	collection:	0
+	collection of:	1
+	color:	0
+	do nothing:	0
+	double:	0
+	ellipse:	0
+	field:	0
+	function:	0
+	game:	0
+	group:	0
+	hexagon:	0
+	image:	0
+	install:	0
+	installed:	0
+	integer:	0
+	new mse:	0
+	nil:	0
+	object:	0
+	pentagon:	0
+	point:	0
+	points:	0
+	polygon:	0
+	rectangle:	0
+	reflection:	0
+	rhombus:	0
+	rotation:	0
+	set:	0
+	shape:	0
+	shapes:	0
+	square:	0
+	star:	0
+	string:	0
+	style:	0
+	stylesheet:	0
+	triangle:	0
+	uninstall:	0
+	uninstalled:	0
+	upgrade:	0
+	upgradeable:	0
+	value:	0
diff --git a/src/resource/msw/mse.rc b/src/resource/msw/mse.rc
index 8731be6a..2138559f 100644
--- a/src/resource/msw/mse.rc
+++ b/src/resource/msw/mse.rc
@@ -173,6 +173,10 @@ edit_symbol				IMAGE	"../common/edit_symbol.png"
 wxBITMAP_STD_COLOURS	BITMAP "wx/msw/colours.bmp"
 WXCURSOR_HAND           CURSOR  DISCARDABLE     "wx/msw/hand.cur"
 
+// -------------------------------------------------------- : Other
+
+expected_locale_keys	TEXT	"../common/expected_locale_keys"
+
 // -------------------------------------------------------- : Version info
 
 1 VERSIONINFO
diff --git a/src/script/to_value.hpp b/src/script/to_value.hpp
index 2928a2dc..7200a090 100644
--- a/src/script/to_value.hpp
+++ b/src/script/to_value.hpp
@@ -112,7 +112,7 @@ class ScriptCollection : public ScriptValue {
   public:
 	inline ScriptCollection(const Collection* v) : value(v) {}
 	virtual ScriptType type() const { return SCRIPT_COLLECTION; }
-	virtual String typeName() const { return format_string(_TYPE_("collection"), type_name(*value->begin())); }
+	virtual String typeName() const { return format_string(_TYPE_("collection of"), type_name(*value->begin())); }
 	virtual ScriptValueP getMember(const String& name) const {
 		long index;
 		if (name.ToLong(&index) && index >= 0 && (size_t)index < value->size()) {
@@ -160,7 +160,7 @@ class ScriptMap : public ScriptValue {
   public:
 	inline ScriptMap(const Collection* v) : value(v) {}
 	virtual ScriptType type() const { return SCRIPT_COLLECTION; }
-	virtual String typeName() const { return format_string(_TYPE_("collection"), type_name(value->begin())); }
+	virtual String typeName() const { return format_string(_TYPE_("collection of"), type_name(value->begin())); }
 	virtual ScriptValueP getMember(const String& name) const {
 		return get_member(*value, name);
 	}
diff --git a/src/script/value.cpp b/src/script/value.cpp
index 72580f6a..5c93c980 100644
--- a/src/script/value.cpp
+++ b/src/script/value.cpp
@@ -16,7 +16,7 @@
 
 ScriptValue::operator String()                              const { return _("[[") + typeName() + _("]]"); }
 ScriptValue::operator int()                                 const { throw ScriptError(_ERROR_2_("can't convert", typeName(), _TYPE_("integer" ))); }
-ScriptValue::operator double()                              const { throw ScriptError(_ERROR_2_("can't convert", typeName(), _TYPE_("real"    ))); }
+ScriptValue::operator double()                              const { throw ScriptError(_ERROR_2_("can't convert", typeName(), _TYPE_("double"  ))); }
 ScriptValue::operator Color()                               const { throw ScriptError(_ERROR_2_("can't convert", typeName(), _TYPE_("color"   ))); }
 ScriptValueP ScriptValue::eval(Context&)                    const { return delayError(_ERROR_2_("can't convert", typeName(), _TYPE_("function"))); }
 ScriptValueP ScriptValue::getMember(const String& name)     const { return delayError(_ERROR_2_("has no member", typeName(), name));              }
@@ -149,7 +149,7 @@ class ScriptDouble : public ScriptValue {
   public:
 	ScriptDouble(double v) : value(v) {}
 	virtual ScriptType type() const { return SCRIPT_DOUBLE; }
-	virtual String typeName() const { return _TYPE_("real"); }
+	virtual String typeName() const { return _TYPE_("double"); }
 	virtual operator String() const { return String() << value; }
 	virtual operator double() const { return value; }
 	virtual operator int()    const { return (int)value; }
diff --git a/src/util/version.hpp b/src/util/version.hpp
index c7aba6c2..2eeb14a5 100644
--- a/src/util/version.hpp
+++ b/src/util/version.hpp
@@ -25,6 +25,8 @@ struct Version {
 	Version()             : version(0)       {}
 	Version(UInt version) : version(version) {}
 	
+	inline bool operator == (Version v) const { return version == v.version; }
+	inline bool operator != (Version v) const { return version != v.version; }
 	inline bool operator <  (Version v) const { return version <  v.version; }
 	inline bool operator <= (Version v) const { return version <= v.version; }
 	inline bool operator >  (Version v) const { return version >  v.version; }
diff --git a/tools/locale/locale.pl b/tools/locale/locale.pl
new file mode 100644
index 00000000..5f9c06ff
--- /dev/null
+++ b/tools/locale/locale.pl
@@ -0,0 +1,104 @@
+#! /usr/bin/perl
+
+# Determine the keys that should be in the locale file,
+# and the number of arguments the keys should have
+
+our %found;
+
+use File::Find;
+find(\&doit, '../../src');
+
+sub arg_count {
+	return scalar split(/,/,$_[0]);
+}
+
+sub make_comment {
+	my $input = $_[0];
+	$input =~ s/(_[A-Z])/_COMMENT$1/g;
+	return $input;
+}
+
+# for each .cpp/.hpp file, collect locale calls
+sub doit {
+	my $file = $File::Find::name;
+	if (!($file =~ /\..pp$/)) {
+		return;
+	}
+	
+	# relative filename
+	#print "$file\n";
+	$file =~ s@.*/@@;
+	
+	# Read file
+	open F, "< $file";
+	my $body = join('',<F>);
+	close F;
+	
+	# Custom argument expansion
+	$inparen = qr/[^()]|\((??{$inparen})*\)/; # recursive paren matching
+	$body =~ s/format_string\((_[A-Z]+)(_\([^)]+\)),($inparen+)/
+	           $1 . "_" . arg_count($3) . $2
+	          /ge;
+	$body =~ s/action_name_for[(][^,]*,\s*(_[A-Z]+)(_\([^)]+\))/$1_1$2/g;
+	
+	# Drop comments, mark found items as 'optional'
+	$body =~ s@//[^\n]*@ find_locale_calls($&, 1)@ge;
+	$body =~ s@/\*.*?\*/@find_locale_calls($&, 1)@ge;
+	
+	find_locale_calls($body, 0);
+}
+
+sub find_locale_calls {
+	my $body       = $_[0];
+	my $in_comment = $_[1];
+	
+	# Find calls to locale functions
+	while ($body =~ /_(COMMENT_)?(MENU|HELP|TOOL|TOOLTIP|LABEL|BUTTON|TITLE|TYPE|ACTION|ERROR)_(?:([1-9])_)?\(\s*\"([^\"]+)\"/g) {
+		$argc = $3 ? $3 : 0;
+		if (defined($found{$2}{$4}{'argc'}) && $found{$2}{$4}{'argc'} != $argc) {
+			print "ERROR: key _$2_($4) used with different arities";
+		}
+		$found{$2}{$4}{'opt'}  = defined($found{$2}{$4}{'opt'}) ? ($found{$2}{$4}{'opt'} && $in_comment) : $in_comment;
+		$found{$2}{$4}{'argc'} = $argc;
+	}
+	# Also translated:
+	while ($body =~ m@
+	                 ( addPanel        \((?:[^,]+,){6} # gui/set/window.cpp
+	                 )
+	                 \s* _ \(\" ([^\"]+) \"\)
+	                @xg
+	      ) {
+		($key = $2) =~ s/_/ /g;
+		foreach $type ("MENU","HELP","TOOL","TOOLTIP") {
+			$found{$type}{$key}{'opt'}  = $in_comment;
+			$found{$type}{$key}{'argc'} = 0;
+		}
+	}
+}
+
+# Now process the items we found, print out a list in MSE reader format
+
+my $result;
+my $now = localtime;
+$result .= "# This file contains the keys expected to be in MSE locales\n";
+$result .= "# It was automatically generated by tools/locale/locale.pl\n";
+$result .= "# Generated on " . $now . "\n\n";
+
+my @types = sort keys %found;
+foreach $type (@types) {
+	$result .= lc($type) . ":\n";
+	my @keys = sort keys %{$found{$type}};
+	foreach $key (@keys) {
+		$argc = $found{$type}{$key}{'argc'};
+		$opt  = $found{$type}{$key}{'opt'} ? 'optional, ' : '';
+		$result .= "\t$key:\t$opt$argc\n";
+	}
+}
+
+# Write to file
+open F, "> ../../src/resource/common/expected_locale_keys";
+print F $result;
+close F;
+
+# and to stdout
+#print $result;