diff --git a/git-commit.sh b/git-commit.sh
index daf90f1e58..41955e8e64 100755
--- a/git-commit.sh
+++ b/git-commit.sh
@@ -184,7 +184,7 @@ then
 		}
 		'
 		set_author_env=`git-cat-file commit "$use_commit" |
-		sed -ne "$pick_author_script"`
+		LANG=C LC_ALL=C sed -ne "$pick_author_script"`
 		eval "$set_author_env"
 		export GIT_AUTHOR_NAME
 		export GIT_AUTHOR_EMAIL
diff --git a/git-format-patch.sh b/git-format-patch.sh
index 548d2d5847..7ee5d328c0 100755
--- a/git-format-patch.sh
+++ b/git-format-patch.sh
@@ -201,7 +201,7 @@ process_one () {
 	    ;;
 	esac
 
-	eval "$(sed -ne "$whosepatchScript" $commsg)"
+	eval "$(LANG=C LC_ALL=C sed -ne "$whosepatchScript" $commsg)"
 	test "$author,$au" = ",$me" || {
 		mailScript="$mailScript"'
 	a\
diff --git a/git-revert.sh b/git-revert.sh
index dfd914cf56..4154fe0d15 100755
--- a/git-revert.sh
+++ b/git-revert.sh
@@ -112,7 +112,7 @@ cherry-pick)
 		q
 	}'
 	set_author_env=`git-cat-file commit "$commit" |
-	sed -ne "$pick_author_script"`
+	LANG=C LC_ALL=C sed -ne "$pick_author_script"`
 	eval "$set_author_env"
 	export GIT_AUTHOR_NAME
 	export GIT_AUTHOR_EMAIL