diff --git a/History.md b/History.md
index 94f19a3..fd8bc69 100644
--- a/History.md
+++ b/History.md
@@ -1,4 +1,3 @@
-
 1.2.0 / 2015-08-31
 ==================
 
diff --git a/README.md b/README.md
index 5099936..7cfe105 100644
--- a/README.md
+++ b/README.md
@@ -39,7 +39,7 @@ var locales = require('koa-locales');
 
 var app = koa();
 app.use(locales({
-  dir: __dirname + '/locales'
+  dirs: [__dirname + '/locales', __dirname + '/foo/locales']
 }));
 ```
 
@@ -61,7 +61,7 @@ Patch locales functions to koa app.
 ```js
 locales({
   app: app,
-  dir: __dirname + '/app/locales',
+  dirs: [__dirname + '/app/locales'],
   defaultLocale: 'zh-CN'
 }));
 ```
diff --git a/index.js b/index.js
index d17f039..d1fde27 100644
--- a/index.js
+++ b/index.js
@@ -20,6 +20,7 @@ var util = require('util');
 var fs = require('fs');
 var path = require('path');
 var ms = require('humanize-ms');
+var merge = require('merge-descriptors');
 
 module.exports = function (app, options) {
   options = options || {};
@@ -27,26 +28,43 @@ module.exports = function (app, options) {
   var queryField = options.queryField || 'locale';
   var cookieField = options.cookieField || 'locale';
   var cookieMaxAge = ms(options.cookieMaxAge || '1y');
-  var localeDir = options.dir || path.join(process.cwd(), 'locales');
+  var localeDir = options.dir;
+  var localeDirs = options.dirs || [path.join(process.cwd(), 'locales')];
   var functionName = options.functionName || '__';
   var resources = {};
 
-  if (fs.existsSync(localeDir)) {
-    var names = fs.readdirSync(localeDir);
-    for (var i = 0; i < names.length; i++) {
-      var name = names[i];
-      var filepath = path.join(localeDir, name);
+  if (localeDir && localeDirs.indexOf(localeDir) === -1) {
+    localeDirs.push(localeDir);
+  }
+
+  for (var i = 0; i < localeDirs.length; i ++) {
+    var dir = localeDirs[i];
+
+    if (!fs.existsSync(dir)) {
+      continue;
+    }
+
+    var names = fs.readdirSync(dir);
+    for (var j = 0; j < names.length; j++) {
+      var name = names[j];
+      var filepath = path.join(dir, name);
       // support en_US.js => en-US.js
       var locale = formatLocale(name.split('.')[0]);
+      var resource = {};
 
       if (name.endsWith('.js') || name.endsWith('.json')) {
-        resources[locale] = require(filepath);
+        resource = require(filepath);
       } else if (name.endsWith('.properties')) {
-        resources[locale] = ini.parse(fs.readFileSync(filepath, 'utf8'));
+        resource = ini.parse(fs.readFileSync(filepath, 'utf8'));
       }
+
+      resources[locale] = resources[locale] || {};
+      merge(resources[locale], resource);
     }
   }
 
+
+
   debug('init locales with %j, got %j resources', options, Object.keys(resources));
 
   var ARRAY_INDEX_RE = /\{(\d+)\}/g;
diff --git a/package.json b/package.json
index 7059a81..bfc9288 100644
--- a/package.json
+++ b/package.json
@@ -30,7 +30,8 @@
     "mm": "~1.1.0",
     "mocha": "*",
     "pedding": "~1.0.0",
-    "supertest": "~1.0.1"
+    "supertest": "~1.0.1",
+    "merge-descriptors": "~1.0.0"
   },
   "homepage": "https://github.com/koajs/locales",
   "repository": {
diff --git a/test/index.test.js b/test/index.test.js
index 707368f..86fa387 100644
--- a/test/index.test.js
+++ b/test/index.test.js
@@ -53,7 +53,7 @@ describe('koa-locales.test.js', function () {
 
   describe('custom options', function () {
     var app = createApp({
-      dir: __dirname + '/locales'
+      dirs: [__dirname + '/locales', __dirname + '/other-locales']
     });
 
     it('should use default locale: en-US', function (done) {
@@ -83,7 +83,7 @@ describe('koa-locales.test.js', function () {
         request(app.callback())
         .get('/?locale=zh-CN')
         .expect({
-          email: '邮箱',
+          email: '邮箱1',
           hello: 'fengmk2，今天过得如何？',
           message: 'Hello fengmk2, how are you today? How was your 18.',
           empty: '',
@@ -128,7 +128,7 @@ describe('koa-locales.test.js', function () {
         .get('/?locale=zh-CN')
         .set('cookie', 'locale=zh-TW')
         .expect({
-          email: '邮箱',
+          email: '邮箱1',
           hello: 'fengmk2，今天过得如何？',
           message: 'Hello fengmk2, how are you today? How was your 18.',
           empty: '',
@@ -175,7 +175,7 @@ describe('koa-locales.test.js', function () {
         .get('/?locale=')
         .set('cookie', 'locale=zh-cn')
         .expect({
-          email: '邮箱',
+          email: '邮箱1',
           hello: 'fengmk2，今天过得如何？',
           message: 'Hello fengmk2, how are you today? How was your 18.',
           empty: '',
@@ -204,7 +204,7 @@ describe('koa-locales.test.js', function () {
         .get('/?locale=')
         .set('Accept-Language', 'zh-CN')
         .expect({
-          email: '邮箱',
+          email: '邮箱1',
           hello: 'fengmk2，今天过得如何？',
           message: 'Hello fengmk2, how are you today? How was your 18.',
           empty: '',
@@ -225,7 +225,7 @@ describe('koa-locales.test.js', function () {
         .get('/?locale=')
         .set('Accept-Language', 'zh-CN,zh;q=0.8')
         .expect({
-          email: '邮箱',
+          email: '邮箱1',
           hello: 'fengmk2，今天过得如何？',
           message: 'Hello fengmk2, how are you today? How was your 18.',
           empty: '',
@@ -246,7 +246,7 @@ describe('koa-locales.test.js', function () {
         .get('/?locale=')
         .set('Accept-Language', 'en;q=0.8, es, zh_CN')
         .expect({
-          email: '邮箱',
+          email: '邮箱1',
           hello: 'fengmk2，今天过得如何？',
           message: 'Hello fengmk2, how are you today? How was your 18.',
           empty: '',
diff --git a/test/other-locales/zh-CN.js b/test/other-locales/zh-CN.js
new file mode 100644
index 0000000..61ca2c0
--- /dev/null
+++ b/test/other-locales/zh-CN.js
@@ -0,0 +1,3 @@
+module.exports = {
+  Email: '邮箱1'
+}