diff --git a/README.md b/README.md
index da66f90..6ad0b2b 100644
--- a/README.md
+++ b/README.md
@@ -97,6 +97,10 @@ __('Hello, %s. %s', 'fengmk2', 'koa rock!')
 __('{0} {0} {1} {1} {1}', ['foo', 'bar'])
 =>
 'foo foo bar bar bar'
+
+__('{a} {a} {b} {b} {b}', {a: 'foo', b: 'bar'})
+=>
+'foo foo bar bar bar'
 ```
 
 ## Usage on template
diff --git a/index.js b/index.js
index 4e3411e..7d5a7df 100644
--- a/index.js
+++ b/index.js
@@ -8,7 +8,7 @@
  *   fengmk2 <m@fengmk2.com> (http://fengmk2.com)
  */
 
-"use strict";
+'use strict';
 
 /**
  * Module dependencies.
@@ -63,6 +63,22 @@ module.exports = function (app, options) {
     });
   }
 
+  var Object_INDEX_RE = /\{(.+?)\}/g;
+  function formatWithObject(text, values) {
+    return text.replace(Object_INDEX_RE, function (orignal, matched) {
+      var value = values[matched];
+      if (value) {
+        return value;
+      }
+      // not match index, return orignal text
+      return orignal;
+    });
+  }
+
+  function isObject(obj) {
+    return Object.prototype.toString.call(obj) === '[object Object]';
+  }
+
   app.context[functionName] = function (key, value, value2, value3, value4) {
     if (arguments.length === 0) {
       // __()
@@ -84,6 +100,14 @@ module.exports = function (app, options) {
       return text;
     }
     if (arguments.length === 2) {
+      if (isObject(value)) {
+        // __(key, object)
+        // __('{a} {b} {b} {a}', {a: 'foo', b: 'bar'})
+        // =>
+        // foo bar bar foo
+        return formatWithObject(text, value);
+      }
+
       if (Array.isArray(value)) {
         // __(key, array)
         // __('{0} {1} {1} {0}', ['foo', 'bar'])
diff --git a/test/index.test.js b/test/index.test.js
index fd24bdf..707368f 100644
--- a/test/index.test.js
+++ b/test/index.test.js
@@ -8,7 +8,7 @@
  *   fengmk2 <m@fengmk2.com> (http://fengmk2.com)
  */
 
-"use strict";
+'use strict';
 
 /**
  * Module dependencies.
@@ -44,6 +44,7 @@ describe('koa-locales.test.js', function () {
         arguments5: '1 2 3 4 5',
         arguments6: '1 2 3 4 5. 6',
         values: 'foo bar foo bar {2} {100}',
+        object: 'foo bar foo bar {z}',
       })
       .expect('Set-Cookie', /^locale=en\-us; path=\/; expires=\w+/)
       .expect(200, done);
@@ -71,6 +72,7 @@ describe('koa-locales.test.js', function () {
         arguments5: '1 2 3 4 5',
         arguments6: '1 2 3 4 5. 6',
         values: 'foo bar foo bar {2} {100}',
+        object: 'foo bar foo bar {z}',
       })
       .expect('Set-Cookie', /^locale=en\-us; path=\/; expires=\w+/)
       .expect(200, done);
@@ -93,6 +95,7 @@ describe('koa-locales.test.js', function () {
           arguments5: '1 2 3 4 5',
           arguments6: '1 2 3 4 5. 6',
           values: 'foo bar foo bar {2} {100}',
+          object: 'foo bar foo bar {z}',
         })
         .expect('Set-Cookie', /^locale=zh\-cn; path=\/; expires=\w+/)
         .expect(200, done);
@@ -114,6 +117,7 @@ describe('koa-locales.test.js', function () {
           arguments5: '1 2 3 4 5',
           arguments6: '1 2 3 4 5. 6',
           values: 'foo bar foo bar {2} {100}',
+          object: 'foo bar foo bar {z}',
         })
         .expect('Set-Cookie', /^locale=de; path=\/; expires=\w+/)
         .expect(200, done);
@@ -136,6 +140,7 @@ describe('koa-locales.test.js', function () {
           arguments5: '1 2 3 4 5',
           arguments6: '1 2 3 4 5. 6',
           values: 'foo bar foo bar {2} {100}',
+          object: 'foo bar foo bar {z}',
         })
         .expect('Set-Cookie', /^locale=zh\-cn; path=\/; expires=\w+/)
         .expect(200, done);
@@ -157,6 +162,7 @@ describe('koa-locales.test.js', function () {
           arguments5: '1 2 3 4 5',
           arguments6: '1 2 3 4 5. 6',
           values: 'foo bar foo bar {2} {100}',
+          object: 'foo bar foo bar {z}',
         })
         .expect('Set-Cookie', /^locale=en\-us; path=\/; expires=\w+/)
         .expect(200, done);
@@ -181,6 +187,7 @@ describe('koa-locales.test.js', function () {
           arguments5: '1 2 3 4 5',
           arguments6: '1 2 3 4 5. 6',
           values: 'foo bar foo bar {2} {100}',
+          object: 'foo bar foo bar {z}',
         })
         .expect(function (res) {
           assert(!res.headers['set-cookie']);
@@ -209,6 +216,7 @@ describe('koa-locales.test.js', function () {
           arguments5: '1 2 3 4 5',
           arguments6: '1 2 3 4 5. 6',
           values: 'foo bar foo bar {2} {100}',
+          object: 'foo bar foo bar {z}',
         })
         .expect('Set-Cookie', /^locale=zh\-cn; path=\/; expires=\w+/)
         .expect(200, done);
@@ -229,6 +237,7 @@ describe('koa-locales.test.js', function () {
           arguments5: '1 2 3 4 5',
           arguments6: '1 2 3 4 5. 6',
           values: 'foo bar foo bar {2} {100}',
+          object: 'foo bar foo bar {z}',
         })
         .expect('Set-Cookie', /^locale=zh\-cn; path=\/; expires=\w+/)
         .expect(200, done);
@@ -249,6 +258,7 @@ describe('koa-locales.test.js', function () {
           arguments5: '1 2 3 4 5',
           arguments6: '1 2 3 4 5. 6',
           values: 'foo bar foo bar {2} {100}',
+          object: 'foo bar foo bar {z}',
         })
         .expect('Set-Cookie', /^locale=zh\-cn; path=\/; expires=\w+/)
         .expect(200, done);
@@ -271,6 +281,7 @@ describe('koa-locales.test.js', function () {
           arguments5: '1 2 3 4 5',
           arguments6: '1 2 3 4 5. 6',
           values: 'foo bar foo bar {2} {100}',
+          object: 'foo bar foo bar {z}',
         })
         .expect('Set-Cookie', /^locale=en\-us; path=\/; expires=\w+/)
         .expect(200, done);
@@ -293,6 +304,7 @@ describe('koa-locales.test.js', function () {
           arguments5: '1 2 3 4 5',
           arguments6: '1 2 3 4 5. 6',
           values: 'foo bar foo bar {2} {100}',
+          object: 'foo bar foo bar {z}',
         })
         .expect('Set-Cookie', /^locale=en\-us; path=\/; expires=\w+/)
         .expect(200, done);
@@ -317,6 +329,7 @@ describe('koa-locales.test.js', function () {
           arguments5: '1 2 3 4 5',
           arguments6: '1 2 3 4 5. 6',
           values: 'foo bar foo bar {2} {100}',
+          object: 'foo bar foo bar {z}',
         })
         .expect('Set-Cookie', /^locale=zh\-tw; path=\/; expires=\w+/)
         .expect(200, done);
@@ -341,6 +354,7 @@ describe('koa-locales.test.js', function () {
           arguments5: '1 2 3 4 5',
           arguments6: '1 2 3 4 5. 6',
           values: 'foo bar foo bar {2} {100}',
+          object: 'foo bar foo bar {z}',
         })
         .expect('Set-Cookie', /^locale=en\-us; path=\/; expires=\w+/)
         .expect(200, done);
@@ -368,6 +382,7 @@ function createApp(options) {
       arguments5: this[fname]('%s %s %s %s %s', 1, 2, 3, 4, 5),
       arguments6: this[fname]('%s %s %s %s %s.', 1, 2, 3, 4, 5, 6),
       values: this[fname]('{0} {1} {0} {1} {2} {100}', ['foo', 'bar']),
+      object: this[fname]('{foo} {bar} {foo} {bar} {z}', {foo: 'foo', bar: 'bar'}),
     };
   });