diff -Nuar a/util/grub-mkconfig.in b/util/grub-mkconfig.in
--- a/util/grub-mkconfig.in	2022-09-01 22:32:28.455672599 +0300
+++ b/util/grub-mkconfig.in	2022-09-01 22:32:49.527671079 +0300
@@ -1,6 +1,8 @@
 #! /bin/sh
 set -e
 
+export LC_ALL=C
+
 # Generate grub.cfg by inspecting /boot contents.
 # Copyright (C) 2006,2007,2008,2009,2010 Free Software Foundation, Inc.
 #