Load plugins from book parent in multilingual book

1 files changed, 7 insertions, 2 deletions

diff --git a/lib/plugins/registry.js b/lib/plugins/registry.js
index ea172c4..064336a 100644
--- a/lib/plugins/registry.js
+++ b/lib/plugins/registry.js
@@ -144,10 +144,15 @@ function listInstalled(folder) {
 function listPlugins(book) {
     return Promise.all([
         listInstalled(path.resolve(__dirname, '../..')),
-        listInstalled(book.root)
+        listInstalled(book.root),
+        book.isLanguageBook()? listInstalled(book.parent.root) : Promise([])
     ])
     .spread(function(defaultPlugins, plugins) {
-        var results = plugins.concat(defaultPlugins);
+        var args = _.toArray(arguments);
+        var results = _.reduce(args, function(out, a) {
+            return out.concat(a);
+        }, []);
+
         return _.uniq(results, 'name');
     });
 }