diff --git a/lazy.ansible/.manala/docker/Dockerfile.tmpl b/lazy.ansible/.manala/docker/Dockerfile.tmpl
index e002ff0a..08a68fed 100644
--- a/lazy.ansible/.manala/docker/Dockerfile.tmpl
+++ b/lazy.ansible/.manala/docker/Dockerfile.tmpl
@@ -18,6 +18,9 @@ ARG DIRENV_VERSION="2.33.0"
 # It's also internally used for checking we're running inside a container.
 ENV container="docker"
 
+# Default locale
+ENV LANG C.UTF-8
+
 SHELL ["/bin/bash", "-o", "pipefail", "-c"]
 
 RUN \
diff --git a/lazy.kubernetes/.manala/docker/Dockerfile.tmpl b/lazy.kubernetes/.manala/docker/Dockerfile.tmpl
index 59a6c9ae..52e71e3d 100644
--- a/lazy.kubernetes/.manala/docker/Dockerfile.tmpl
+++ b/lazy.kubernetes/.manala/docker/Dockerfile.tmpl
@@ -18,6 +18,9 @@ ARG DIRENV_VERSION="2.33.0"
 # It's also internally used for checking we're running inside a container.
 ENV container="docker"
 
+# Default locale
+ENV LANG C.UTF-8
+
 SHELL ["/bin/bash", "-o", "pipefail", "-c"]
 
 RUN \
diff --git a/lazy.symfony/.manala/docker/Dockerfile.tmpl b/lazy.symfony/.manala/docker/Dockerfile.tmpl
index 6ed94d34..6e88280b 100644
--- a/lazy.symfony/.manala/docker/Dockerfile.tmpl
+++ b/lazy.symfony/.manala/docker/Dockerfile.tmpl
@@ -18,6 +18,9 @@ ARG DIRENV_VERSION="2.33.0"
 # It's also internally used for checking we're running inside a container.
 ENV container="docker"
 
+# Default locale
+ENV LANG C.UTF-8
+
 SHELL ["/bin/bash", "-o", "pipefail", "-c"]
 
 RUN \