diff --git a/src/plugins/lib/libtranslate.py b/src/plugins/lib/libtranslate.py
index 56f36ef90..e6518823c 100644
--- a/src/plugins/lib/libtranslate.py
+++ b/src/plugins/lib/libtranslate.py
@@ -62,6 +62,7 @@ _LANG_MAP = {
     "hr" : _("Croatian"),
     "hu" : _("Hungarian"),
     "it" : _("Italian"),
+    "ja" : _("Japanese"),
     "lt" : _("Lithuanian"),
     "mk" : _("Macedonian"),
     "nb" : _("Norwegian Bokmal"),