diff --git a/site.mk b/site.mk
index a674d3a..a1a6aec 100644
--- a/site.mk
+++ b/site.mk
@@ -29,3 +29,5 @@ DEFAULT_GLUON_RELEASE := 0.6+exp$(shell date '+%Y%m%d')
 GLUON_RELEASE ?= $(DEFAULT_GLUON_RELEASE)
 
 GLUON_PRIORITY ?= 0
+
+GLUON_LANGS ?= en de