3 files changed, 39 insertions, 6 deletions
diff --git a/lib/output/__tests__/json.js b/lib/output/__tests__/json.js
index 46ab42f..9897813 100644
--- a/lib/output/__tests__/json.js
+++ b/lib/output/__tests__/json.js
@@ -25,5 +25,22 @@ describe('JSONGenerator', function() {
             expect(folder).toHaveFile('test/page.json');
         });
     });
+
+    it('should generate a multilingual book', function() {
+        return generateMock(JSONGenerator, {
+            'LANGS.md': '# Languages\n\n* [en](en)\n* [fr](fr)',
+            'en': {
+                'README.md': 'Hello'
+            },
+            'fr': {
+                'README.md': 'Bonjour'
+            }
+        })
+        .then(function(folder) {
+            expect(folder).toHaveFile('en/README.json');
+            expect(folder).toHaveFile('fr/README.json');
+            expect(folder).toHaveFile('README.json');
+        });
+    });
 });
 
diff --git a/lib/output/json/index.js b/lib/output/json/index.js
index e24c127..361da06 100644
--- a/lib/output/json/index.js
+++ b/lib/output/json/index.js
@@ -2,5 +2,6 @@
 module.exports = {
     name:       'json',
     Options:    require('./options'),
-    onPage:     require('./onPage')
+    onPage:     require('./onPage'),
+    onFinish:   require('./onFinish')
 };
diff --git a/lib/output/json/onFinish.js b/lib/output/json/onFinish.js
index ff336a2..d41d778 100644
--- a/lib/output/json/onFinish.js
+++ b/lib/output/json/onFinish.js
@@ -2,6 +2,7 @@ var path = require('path');
 
 var Promise = require('../../utils/promise');
 var fs = require('../../utils/fs');
+var JSONUtils = require('../../json');
 
 /**
     Finish the generation
@@ -21,11 +22,25 @@ function onFinish(output) {
     var languages = book.getLanguages();
     var mainLanguage = languages.getDefaultLanguage();
 
-    // Copy README.json from it
-    return fs.copy(
-        path.resolve(outputRoot, mainLanguage.getID(), 'README.json'),
-        path.resolve(outputRoot, 'README.json')
-    )
+    // Read the main JSON
+    return fs.readFile(path.resolve(outputRoot, mainLanguage.getID(), 'README.json'), 'utf8')
+
+    // Extend the JSON
+    .then(function(content) {
+        var json = JSON.parse(content);
+
+        json.languages = JSONUtils.encodeLanguages(languages);
+
+        return json;
+    })
+
+    .then(function(json) {
+        return fs.writeFile(
+            path.resolve(outputRoot, 'README.json'),
+            JSON.stringify(json, null, 4)
+        );
+    })
+
     .thenResolve(output);
 }