diff --git a/cryptonote_utils/mnemonic_languages.js b/cryptonote_utils/mnemonic_languages.js
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+++ b/cryptonote_utils/mnemonic_languages.js
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+// Copyright (c) 2014-2018, MyMonero.com
+//
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without modification, are
+// permitted provided that the following conditions are met:
+//
+// 1. Redistributions of source code must retain the above copyright notice, this list of
+//	conditions and the following disclaimer.
+//
+// 2. Redistributions in binary form must reproduce the above copyright notice, this list
+//	of conditions and the following disclaimer in the documentation and/or other
+//	materials provided with the distribution.
+//
+// 3. Neither the name of the copyright holder nor the names of its contributors may be
+//	used to endorse or promote products derived from this software without specific
+//	prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
+// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
+// THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
+// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+//
+"use strict";
+//
+const supported_short_codes = exports.supported_short_codes = 
+[
+	"en",
+	"nl", 
+	"fr",
+	"es",
+	"pt",
+	"ja",
+	"it",
+	"de", 
+	"ru",
+	"zh", // chinese (simplified)
+	"eo", 
+	"jbo" // Lojban
+];
+exports.mnemonic_languages =
+[
+	"English",
+	"Netherlands",
+	"Français",
+	"Español",
+	"Português",
+	"日本語",
+	"Italiano",
+	"Deutsch", 
+	"русский язык",
+	"简体中文 (中国)",
+	"Esperanto",
+	"Lojban"
+];
+exports.compatible_code_from_locale = function(locale_string)
+{
+	const supported_short_codes__length = supported_short_codes.length
+	for (var i = 0 ; i < supported_short_codes__length ; i++) {
+		const short_code = supported_short_codes[i]
+		if (locale_string.indexOf(short_code) == 0) {
+			return short_code
+		}
+	}
+	throw "Didn't find a code"
+	// return undefined
+}
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