1 files changed, 4 insertions, 0 deletions
diff --git a/lib/json/encodeBook.js b/lib/json/encodeBook.js
index 9bcb6ee..9d7ec77 100644
--- a/lib/json/encodeBook.js
+++ b/lib/json/encodeBook.js
@@ -4,6 +4,7 @@ var gitbook = require('../gitbook');
 var encodeSummary = require('./encodeSummary');
 var encodeGlossary = require('./encodeGlossary');
 var encodeReadme = require('./encodeReadme');
+var encodeLanguages = require('./encodeLanguages');
 
 /**
     Encode a book to JSON
@@ -22,6 +23,9 @@ function encodeBookToJson(book) {
         glossary: encodeGlossary(book.getGlossary()),
         readme: encodeReadme(book.getReadme()),
         config: book.getConfig().getValues().toJS(),
+
+        languages: book.isMultilingual()? encodeLanguages(book.getLanguages()) : undefined,
+
         gitbook: {
             version: gitbook.version,
             time: gitbook.START_TIME