diff --git a/scripts/commit-msg.hook b/scripts/commit-msg.hook
index 96692fdde..f34e693fd 100755
--- a/scripts/commit-msg.hook
+++ b/scripts/commit-msg.hook
@@ -476,7 +476,7 @@ validate_commit_message() {
 
   # Alert if the commit message appears to be written in Chinese.
   # This pattern matches any Chinese character (common CJK Unified Ideographs).
-  MISSPELLED_WORDS=$(echo "$FULL_COMMIT_MSG" | grep "[一-龥]")
+  MISSPELLED_WORDS=$(echo "$FULL_COMMIT_MSG" | LC_ALL=C grep "[一-龥]")
   if [ -n "$MISSPELLED_WORDS" ]; then
     add_warning 1 "Commit message appears to be written in Chinese: $MISSPELLED_WORDS"
   fi
diff --git a/scripts/pre-commit.hook b/scripts/pre-commit.hook
index 9f4dce1fd..bae4cb5ef 100755
--- a/scripts/pre-commit.hook
+++ b/scripts/pre-commit.hook
@@ -99,7 +99,7 @@ RETURN=0
 
 # Disallow non-ASCII characters in workspace path
 workspace=$(git rev-parse --show-toplevel)
-if echo "$workspace" | grep -q "[一-龥]"; then
+if echo "$workspace" | LC_ALL=C grep -q "[一-龥]"; then
   throw "The workspace path '$workspace' contains non-ASCII characters."
 fi