diff --git a/.eslintrc.yml b/.eslintrc.yml
index 0fe49c2b..cbeacb9c 100644
--- a/.eslintrc.yml
+++ b/.eslintrc.yml
@@ -1,4 +1,8 @@
 extends: eslint:recommended
+env:
+    es6: true
+parserOptions:
+    sourceType: module
 rules:
     no-undef: 0
     no-redeclare: 0
diff --git a/debian/changelog b/debian/changelog
index 60bfad96..df3f3bf1 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,4 +1,4 @@
-hedera-web (1.405.50) stable; urgency=low
+hedera-web (1.405.51) stable; urgency=low
 
   * Initial Release.
 
diff --git a/package.json b/package.json
index a8e60b77..5cf1e070 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "hedera-web",
-  "version": "1.405.50",
+  "version": "1.405.51",
   "description": "Verdnatura web page",
   "license": "GPL-3.0",
   "repository": {
@@ -8,11 +8,14 @@
     "url": "https://git.verdnatura.es/hedera-web"
   },
   "devDependencies": {
+    "archiver": "^2.1.0",
     "assets-webpack-plugin": "^3.5.1",
     "bundle-loader": "^0.5.4",
     "css-loader": "^0.25.0",
     "eslint": "^3.16.1",
     "file-loader": "^0.9.0",
+    "fs-extra": "^5.0.0",
+    "glob": "^7.1.2",
     "json-loader": "^0.5.4",
     "raw-loader": "^0.5.1",
     "style-loader": "^0.19.0",
diff --git a/rest/core/locale/en.json b/rest/core/locale/en.json
new file mode 100644
index 00000000..75f9e384
--- /dev/null
+++ b/rest/core/locale/en.json
@@ -0,0 +1,5 @@
+{
+	 "InvalidAction": "Invalid action"
+
+	,"EmptyQuery": "Empty query"
+}
diff --git a/rest/dms/invoice.sql b/rest/dms/invoice.sql
index 71e43303..f3249727 100644
--- a/rest/dms/invoice.sql
+++ b/rest/dms/invoice.sql
@@ -1,5 +1,5 @@
 
-SELECT CONCAT_WS('/', c.pdfs_dir, invoice_get_path (#invoice))
+SELECT CONCAT_WS('/', c.pdfs_dir, invoiceGetPath(#invoice))
 	FROM config c
 	JOIN invoice_view i
 		WHERE i.invoice_id = #invoice
diff --git a/utils/extract-locale.js b/utils/extract-locale.js
new file mode 100644
index 00000000..d6cac973
--- /dev/null
+++ b/utils/extract-locale.js
@@ -0,0 +1,88 @@
+var glob = require('glob');
+var fs = require('fs-extra');
+var path = require('path');
+var archiver = require('archiver');
+
+let lang = process.argv[2];
+
+if (lang == null)
+{
+	let baseName = path.basename(process.argv[1]);
+	console.log(`Usage: ${baseName} language_code`);
+	process.exit(1);
+}
+
+let nDirs;
+let projectDir;
+
+fs.remove(lang, () => {
+	fs.realpath(`${__dirname}/..`, (err, realPath) => {
+		projectDir = realPath;
+		let len = projectDir.length + 1;
+		
+		glob(`${projectDir}/**/locale/`, (err, localeDirs) => {
+			nDirs = localeDirs.length * 2;
+
+			for (let localeDir of localeDirs) {
+				localeDir = localeDir.substr(len)
+
+				if (/^node_modules\//.test (localeDir))
+					continue;
+
+				exportLocale(localeDir);
+			}
+		})
+	});
+});
+
+function exportLocale (localeDir) {
+	let dstDir = `${lang}/${localeDir}`;
+	
+	fs.mkdirp(dstDir, err => {
+		if (err) {
+			onError(err);
+			return;
+		}
+
+		let src, dst;
+		
+		src = `${projectDir}/${localeDir}/en.json`;
+		dst = `${dstDir}/en.json`;
+		fs.copy(src, dst, onDirEnd);
+
+		src = `${projectDir}/${localeDir}/${lang}.json`;
+		dst = `${dstDir}/${lang}.json`;
+		fs.copy(src, dst, onDirEnd);
+	});
+}
+
+function onError (err) {
+	console.log(err);
+	onDirEnd();
+}
+
+let output;
+let archive;
+
+function onDirEnd() {
+	nDirs--;
+	if (nDirs > 0) return;
+
+	output = fs.createWriteStream(`${lang}.zip`);
+	output.on ('close', onArchiveEnd);
+
+	archive = archiver('zip', {
+		zlib: { level: 9 }
+	});
+	archive.on ('error', err => {
+		throw err;
+	});
+	archive.pipe(output);
+	archive.directory(lang);
+	archive.finalize();
+}
+
+function onArchiveEnd() {
+	fs.remove(lang);
+	console.log ('Export finalized!');
+}
diff --git a/webpack.config.js b/webpack.config.js
index e3a19003..9139ef47 100644
--- a/webpack.config.js
+++ b/webpack.config.js
@@ -1,12 +1,12 @@
-var path = require ('path');
-var webpack = require ('webpack');
-var AssetsWebpackPlugin = require ('assets-webpack-plugin');
-var WebpackChunkHash = require ('webpack-chunk-hash');
-var merge = require ('webpack-merge');
-var wpConfig = require ('./webpack.config.json');
+var path = require('path');
+var webpack = require('webpack');
+var AssetsWebpackPlugin = require('assets-webpack-plugin');
+var WebpackChunkHash = require('webpack-chunk-hash');
+var merge = require('webpack-merge');
+var wpConfig = require('./webpack.config.json');
 
 var devMode = process.env.NODE_ENV !== 'production';
-var outputPath = path.join (__dirname, wpConfig.buildDir);
+var outputPath = path.join(__dirname, wpConfig.buildDir);
 var publicPath = wpConfig.buildDir +'/';
 
 var baseConfig = {
@@ -34,12 +34,12 @@ var baseConfig = {
 		__dirname: true
 	},
 	plugins: [
-		new webpack.DefinePlugin ({
+		new webpack.DefinePlugin({
 			_DEV_MODE: devMode,
 			_DEV_SERVER_PORT: wpConfig.devServerPort,
 			_PUBLIC_PATH: JSON.stringify (publicPath)
 		}),
-		new webpack.optimize.CommonsChunkPlugin ({
+		new webpack.optimize.CommonsChunkPlugin({
 			names: ['vendor', 'manifest']
 		})
 	],
@@ -54,15 +54,15 @@ var prodConfig = {
 		chunkFilename: 'chunk.[id].[chunkhash].js'
 	},
 	plugins: [
-		new webpack.optimize.UglifyJsPlugin ({
+		new webpack.optimize.UglifyJsPlugin({
 			minimize: true,
 			compress: { warnings: false }
 		}),
-		new AssetsWebpackPlugin ({
+		new AssetsWebpackPlugin({
 			path: outputPath
 		}),
-		new webpack.HashedModuleIdsPlugin (),
-		new WebpackChunkHash ()
+		new webpack.HashedModuleIdsPlugin(),
+		new WebpackChunkHash()
 	],
 	devtool: 'source-map'
 };
@@ -73,7 +73,7 @@ var devConfig = {
 		chunkFilename: 'chunk.[id].js'
 	},
 	plugins: [
-		new webpack.NamedModulesPlugin ()
+		new webpack.NamedModulesPlugin()
 	],
 	devServer: {
 		host: '0.0.0.0',
@@ -85,4 +85,4 @@ var devConfig = {
 };
 
 var mrgConfig = devMode ? devConfig : prodConfig;
-module.exports = merge (baseConfig, mrgConfig);
+module.exports = merge(baseConfig, mrgConfig);