diff --git a/hugolib/site.go b/hugolib/site.go
index f239cf607..15123526d 100644
--- a/hugolib/site.go
+++ b/hugolib/site.go
@@ -488,9 +488,9 @@ func newSiteRefLinker(cfg config.Provider, s *Site) (siteRefLinker, error) {
 
 func (s siteRefLinker) logNotFound(ref, what string, p *Page) {
 	if p != nil {
-		s.errorLogger.Printf("REF_NOT_FOUND: Ref %q: %s", ref, what)
+		s.errorLogger.Printf("[%s] REF_NOT_FOUND: Ref %q: %s", s.s.Lang(), ref, what)
 	} else {
-		s.errorLogger.Printf("REF_NOT_FOUND: Ref %q from page %q: %s", ref, p.absoluteSourceRef(), what)
+		s.errorLogger.Printf("[%s] REF_NOT_FOUND: Ref %q from page %q: %s", s.s.Lang(), ref, p.absoluteSourceRef(), what)
 	}
 
 }