diff --git a/docker/frontend/Dockerfile b/docker/frontend/Dockerfile
index c1107561d..1a4b1cd5f 100644
--- a/docker/frontend/Dockerfile
+++ b/docker/frontend/Dockerfile
@@ -4,6 +4,8 @@ ARG FROM_TAG=20
 FROM ${FROM_IMG}:${FROM_TAG}
 
 ENV LANG=de_DE.UTF-8
+ENV LANGUAGE=de_DE.UTF-8
+ENV LC_ALL=de_DE.UTF-8
 
 # build and watch dependencies
 RUN apt-get -y update && apt-get -y install exiftool