diff --git a/lang.js b/lang.js
new file mode 100644
index 0000000000..44f2f8f320
--- /dev/null
+++ b/lang.js
@@ -0,0 +1,157 @@
+// node lang.js espocrm-nl_NL.po lastRelease nl_NL
+
+if (process.argv.length < 2) {
+    throw new Error('No dir argument passed');
+}
+
+var path = require('path');
+var fs = require('fs');
+var nodePath = require('path');
+var os = require('os');
+var isWin = /^win/.test(os.platform());
+
+var espoPath = path.dirname(fs.realpathSync(__filename)) + '';
+
+var resLang = process.argv[2] || 'lang_LANG';
+
+var poPath = process.argv[3] || espoPath + '/build/' + 'espocrm-' + resLang +'.po';
+
+
+var deleteFolderRecursive = function (path) {
+    var files = [];
+    if( fs.existsSync(path) ) {
+        files = fs.readdirSync(path);
+        files.forEach(function(file,index){
+            var curPath = path + "/" + file;
+            if(fs.lstatSync(curPath).isDirectory()) { // recurse
+                deleteFolderRecursive(curPath);
+            } else { // delete file
+                fs.unlinkSync(curPath);
+            }
+        });
+        fs.rmdirSync(path);
+    }
+};
+
+
+function Lang (poPath, espoPath) {
+    this.poPath = poPath;
+
+    this.espoPath = espoPath;
+    if (this.espoPath.substr(-1) != '/') {
+        this.espoPath += '/';
+    }
+
+    this.currentPath = path.dirname(fs.realpathSync(__filename)) + '/';
+
+    this.moduleList = ['Crm'];
+    this.baseLanguage = 'en_US';
+
+    var dirNames = this.dirNames = {};
+
+    var resDirNames = this.resDirNames = {};
+
+    var coreDir = this.espoPath + 'application/Espo/Resources/i18n/' + this.baseLanguage + '/';
+    var dirs = [coreDir];
+    dirNames[coreDir] = 'application/Espo/Resources/i18n/' + resLang + '/';
+
+    this.moduleList.forEach(function (moduleName) {
+        var dir = this.espoPath + 'application/Espo/Modules/' + moduleName + '/Resources/i18n/' + this.baseLanguage + '/';
+        dirs.push(dir);
+        dirNames[dir] = 'application/Espo/Modules/' + moduleName + '/Resources/i18n/' + resLang + '/';
+    }, this);
+
+    var installDir = this.espoPath + 'install/core/i18n/' + this.baseLanguage + '/';
+    dirs.push(installDir);
+    dirNames[installDir] = 'install/core/i18n/' + resLang + '/';
+
+    this.dirs = dirs;
+};
+
+Lang.prototype.escape = function(s) {
+    return s.replace(/[-\/\\^$*+?.()|[\]{}]/g, '\\$&');
+};
+
+Lang.prototype.run = function () {
+
+    var translationHash = {};
+    var dirs = this.dirs;
+
+    var contents = fs.readFileSync(this.poPath, 'utf8');
+    var matches = contents.match(new RegExp('msgid (\"(.*)\".*\n)+.*msgstr (\"(.*)\"(\n)?)+', 'g'));
+
+    matches.forEach(function (part) {
+
+        //remove line break "\n"
+        part = part.replace(/"\n"/g, '');
+
+        var res = part.match(new RegExp('msgid \"(.*)\".*\n.*msgstr \"(.*)\"'));
+        translationHash[res[1]] = res[2];
+    }, this);
+
+    dirs.forEach(function (path) {
+        var resDirPath = this.dirNames[path];
+
+        var resPath = this.currentPath + 'build/' + resLang + '/' + resDirPath;
+
+        if (!fs.existsSync(resPath)) {
+            var d = '';
+            resPath.split('/').forEach(function (f) {
+
+                if (!f) {
+                    return;
+                }
+
+                if (isWin) {
+                    d = nodePath.join(d, f);
+                } else {
+                    d += '/' + f;
+                }
+
+                if (!fs.existsSync(d)) {
+                    fs.mkdirSync(d);
+                }
+            });
+        }
+
+        var list = fs.readdirSync(path);
+        list.forEach(function (fileName) {
+            var filePath = path + fileName;
+            var resFilePath = resPath + '/' + fileName;
+
+            var contents = fs.readFileSync(filePath, 'utf8');
+
+            for (var key in translationHash) {
+
+                if (!translationHash[key].trim()) {
+                    continue;
+                }
+
+                var escapedKey = this.escape(key);
+                contents = contents.replace(new RegExp(': *\"(' + escapedKey  + ')\"', 'g'), ': "' + translationHash[key] + '"');
+            }
+
+            for (var key in translationHash) {
+                if (key.substr(0, 2) == "\\\"") {
+
+                    if (!translationHash[key].trim()) {
+                       continue;
+                    }
+
+                    var escapedKey = this.escape(key);
+                    contents = contents.replace(new RegExp('(' + escapedKey  + ')', 'g'), '' + translationHash[key].replace(/\\"/g, '"') + '');
+                }
+            }
+
+            if (fs.existsSync(resFilePath)) {
+                fs.unlinkSync(resFilePath);
+            }
+            fs.writeFileSync(resFilePath , contents);
+
+        }, this);
+
+    }, this);
+};
+
+var lang = new Lang(poPath, espoPath);
+lang.run();
\ No newline at end of file
diff --git a/po.js b/po.js
new file mode 100644
index 0000000000..465070aae4
--- /dev/null
+++ b/po.js
@@ -0,0 +1,186 @@
+//to run: node po.js lastRelease es_ES
+
+if (process.argv.length < 2) {
+	throw new Error('No dir argument passed');
+}
+
+var path = require('path');
+var fs = require('fs');
+
+var language = process.argv[2];
+
+var espoPath = path.dirname(fs.realpathSync(__filename)) + '';
+
+function PO (espoPath, language) {
+	this.moduleList = ['Crm'];
+	this.baseLanguage = 'en_US';
+	this.language = language || this.baseLanguage;
+
+	this.currentPath = path.dirname(fs.realpathSync(__filename)) + '/';
+
+	this.outputFileName = 'espocrm-' + this.language + '.po';
+
+	this.path = espoPath;
+	if (this.path.substr(-1) != '/') {
+        this.path += '/';
+    }
+
+	var dirs = [
+		this.path + 'application/Espo/Resources/i18n/',
+		this.path + 'install/core/i18n/'
+	];
+	this.moduleList.forEach(function (moduleName) {
+		dirs.push(this.path + 'application/Espo/Modules/' + moduleName + '/Resources/i18n/');
+	}, this);
+
+	this.dirs = dirs;
+
+    this.poContentHeader = 'msgid ""\n' +
+        'msgstr ""\n' +
+        '"Project-Id-Version: \\n"\n' +
+        '"POT-Creation-Date: \\n"\n' +
+        '"PO-Revision-Date: \\n"\n' +
+        '"Last-Translator: \\n"\n' +
+        '"Language-Team: EspoCRM <infobox@espocrm.com>\\n"\n' +
+        '"MIME-Version: 1.0\\n"\n' +
+        '"Content-Type: text/plain; charset=UTF-8\\n"\n' +
+        '"Content-Transfer-Encoding: 8bit\\n"\n' +
+        '"Language: ' + this.language + '\\n"\n\n';
+};
+
+PO.prototype.run = function () {
+	var dirs = this.dirs;
+	var messageList = [];
+	var langMessageList = [];
+	var self = this;
+    var poContents = this.poContentHeader;
+
+	dirs.forEach(function (path) {
+
+		var dirPath = this.getDirPath(path, self.baseLanguage);
+
+		var list = fs.readdirSync(dirPath);
+		list.forEach(function (fileName) {
+
+			var filePath = this.getDirPath(path, self.baseLanguage) + fileName;
+			messageList = this.getMessageList(filePath, messageList);
+
+			if (self.language != self.baseLanguage) {
+				var langFilePath = this.getDirPath(path, self.language) + fileName;
+				langMessageList = this.getMessageList(langFilePath, langMessageList);
+			}
+
+		}, this);
+
+	}, this);
+
+	if (self.language == self.baseLanguage) {
+		langMessageList = messageList;
+	}
+
+	for(var index in messageList) {
+		poContents += 'msgid "' + messageList[index] + '"\n';
+
+		var langMessage = langMessageList[index] || "";
+		poContents += 'msgstr "' + langMessage + '"\n\n';
+	}
+
+	var resFilePath = this.currentPath + 'build/' + this.outputFileName;
+
+	if (fs.existsSync(resFilePath)) {
+		fs.unlinkSync(resFilePath);
+	}
+
+	fs.writeFileSync(resFilePath, poContents);
+};
+
+PO.prototype.getMessageList = function (filePath, currentMessageList) {
+	if (!fs.existsSync(filePath)) {
+		return currentMessageList;
+	}
+
+	var data = fs.readFileSync(filePath, 'utf8');
+	data = JSON.parse(data);
+
+	currentMessageList = this.convertToSigleObject(data, '', currentMessageList);
+
+	return currentMessageList;
+}
+
+PO.prototype.getDirPath = function (path, language) {
+	var dirPath = path + language + '/';
+	return dirPath;
+}
+
+PO.prototype.convertToSigleObject = function (dataObject, prefix, currentMessageList) {
+
+	prefix = prefix || '';
+
+	for(var index in dataObject) {
+		if (dataObject[index] === null || dataObject[index] === "") {
+			continue;
+		}
+
+		if (Array.isArray(dataObject[index])) {
+			dataObject[index] = '"' + dataObject[index].join('", "') + '"';
+		}
+
+		if (typeof dataObject[index] === 'object') {
+			var nextPrefix = prefix + index + ".";
+			currentMessageList = this.convertToSigleObject(dataObject[index], nextPrefix, currentMessageList);
+		} else {
+			if (!this.objectIndexOf(dataObject[index], currentMessageList)) {
+				var key = prefix + index;
+				key = this.checkFixDuplicateKey(key, currentMessageList);
+				var savedString = this.fixString(dataObject[index]);
+
+				currentMessageList[key] = savedString;
+			}
+		}
+	}
+
+	return currentMessageList;
+}
+
+PO.prototype.objectIndexOf = function (value, data) {
+	for(var index in data) {
+		if (data[index] !== null && data[index] === value) {
+			return true;
+		}
+	}
+	return false;
+}
+
+PO.prototype.checkFixDuplicateKey = function (key, data) {
+	if (this.objectIndexOfKey(key, data)) {
+		key = key + "+";
+		key = this.checkFixDuplicateKey(key, data);
+	}
+	return key;
+}
+
+PO.prototype.objectIndexOfKey = function (key, data) {
+	for(var index in data) {
+		if (index !== null && index === key) {
+			return true;
+		}
+	}
+	return false;
+}
+
+PO.prototype.replaceAll = function (string, find, replace) {
+	escapedRegExp = find.replace(/([.*+?^=!:${}()|\[\]\/\\])/g, "\\$1");
+	return string.replace(new RegExp(escapedRegExp, 'g'), replace);
+}
+
+PO.prototype.fixString = function (savedString) {
+	savedString = this.replaceAll(savedString, '"', '\\"');
+	savedString = this.replaceAll(savedString, "\n", '\\n');
+	savedString = this.replaceAll(savedString, "\t", '\\t');
+	return savedString;
+}
+
+var po = new PO(espoPath, language);
+
+po.run();
+