Add clientside translations.

src/translation.h

@@ -0,0 +1,42 @@
+/*
+Minetest
+Copyright (C) 2017 Nore, Nathanaël Courant <nore@mesecons.net>
+
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU Lesser General Public License as published by
+the Free Software Foundation; either version 2.1 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU Lesser General Public License for more details.
+
+You should have received a copy of the GNU Lesser General Public License along
+with this program; if not, write to the Free Software Foundation, Inc.,
+51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+*/
+
+#pragma once
+
+#include <unordered_map>
+#include <string>
+
+class Translations;
+extern Translations *g_translations;
+
+class Translations
+{
+public:
+	Translations() = default;
+
+	~Translations();
+
+	void loadTranslation(const std::string &data);
+	void clear();
+	const std::wstring &getTranslation(
+			const std::wstring &textdomain, const std::wstring &s);
+
+private:
+	std::unordered_map<std::wstring, std::wstring> m_translations;
+};