diff --git a/data/lang_install.sh b/data/lang_install.sh
index 626a9fc..867d847 100644
--- a/data/lang_install.sh
+++ b/data/lang_install.sh
@@ -1,8 +1,19 @@
 #!/bin/sh
 
+INST_FLAG_FN=/tmp/lang_patch.log
+
 DIR_PATCH=/etc/crontabs/patches
 DIR_BACKUP=$DIR_PATCH/lang_backup
 
+TARGET1_DIR=/usr/share/xiaoqiang
+MIRROR1_DIR=/tmp/_usr_share_xiaoqiang
+SYNCOBJECT1=$MIRROR1_DIR.sync
+
+TARGET2_DIR=/usr/lib/lua/luci
+MIRROR2_DIR=/tmp/_usr_lib_lua_luci
+SYNCOBJECT2=$MIRROR2_DIR.sync
+
+
 if [ `find /tmp -maxdepth 1 -name 'base.*.lmo' | wc -l` -eq 0 ]; then
 	return 1
 fi
@@ -23,28 +34,28 @@ fi
 
 if [ $CLEAN_INSTALL = 1 ]; then
 	NEED_RESTORE_MNT=0
-	if mount | grep -q ' on /usr/lib/lua/luci' ; then
-		umount -l /usr/lib/lua/luci
+	if mount | grep -q " on $TARGET1_DIR" ; then
+		umount -l $TARGET1_DIR
 		NEED_RESTORE_MNT=1
 	fi
-	if [ -f /usr/lib/lua/luci/i18n/base.en.lmo ]; then
-		# INT firmware may contain a file "base.en.lmo"
-		echo "1" > $DIR_BACKUP/skip_base_en
+	if grep -q "option CHANNEL 'stable'" $TARGET1_DIR/xiaoqiang_version ; then
+		echo '1' > $DIR_BACKUP/fw_stable
 	fi
-	cp -f /usr/lib/lua/luci/view/web/inc/sysinfo.htm $DIR_BACKUP/
-	cp -f /usr/lib/lua/luci/i18n/base.*.lmo $DIR_BACKUP/
-	[ $NEED_RESTORE_MNT = 1 ] && mount --bind /tmp/_usr_lib_lua_luci /usr/lib/lua/luci
+	[ $NEED_RESTORE_MNT = 1 ] && mount --bind $MIRROR1_DIR $TARGET1_DIR
 fi
 if [ $CLEAN_INSTALL = 1 ]; then
 	NEED_RESTORE_MNT=0
-	if mount | grep -q ' on /usr/share/xiaoqiang' ; then
-		umount -l /usr/share/xiaoqiang
+	if mount | grep -q " on $TARGET2_DIR" ; then
+		umount -l $TARGET2_DIR
 		NEED_RESTORE_MNT=1
 	fi
-	if grep -q "option CHANNEL 'stable'" /usr/share/xiaoqiang/xiaoqiang_version ; then
-		echo '1' > $DIR_BACKUP/fw_stable
+	if [ -f $TARGET2_DIR/i18n/base.en.lmo ]; then
+		# INT firmware may contain a file "base.en.lmo"
+		echo "1" > $DIR_BACKUP/skip_base_en
 	fi
-	[ $NEED_RESTORE_MNT = 1 ] && mount --bind /tmp/_usr_share_xiaoqiang /usr/share/xiaoqiang
+	cp -f $TARGET2_DIR/view/web/inc/sysinfo.htm $DIR_BACKUP/
+	cp -f $TARGET2_DIR/i18n/base.*.lmo $DIR_BACKUP/
+	[ $NEED_RESTORE_MNT = 1 ] && mount --bind $MIRROR2_DIR $TARGET2_DIR
 fi
 
 if [ -f $DIR_BACKUP/skip_base_en ]; then
@@ -105,6 +116,7 @@ fi
 uci set luci.main.lang=en
 #uci commit luci
 
-# run patch
+# forced run patch
+rm -f $INST_FLAG_FN
 $DIR_PATCH/lang_patch.sh
 
diff --git a/data/lang_patch.sh b/data/lang_patch.sh
index 9477b3c..f325f64 100644
--- a/data/lang_patch.sh
+++ b/data/lang_patch.sh
@@ -1,48 +1,64 @@
 #!/bin/sh
 
-[ -e "/tmp/lang_patch.log" ] && return 0
+INST_FLAG_FN=/tmp/lang_patch.log
+
+[ -e "$INST_FLAG_FN" ] && return 0
 
 DIR_PATCH=/etc/crontabs/patches
 DIR_BACKUP=$DIR_PATCH/lang_backup
-SYNC_OBJ=/tmp/_patch_sync
+
+TARGET1_DIR=/usr/share/xiaoqiang
+MIRROR1_DIR=/tmp/_usr_share_xiaoqiang
+SYNCOBJECT1=$MIRROR1_DIR.sync
+
+TARGET2_DIR=/usr/lib/lua/luci
+MIRROR2_DIR=/tmp/_usr_lib_lua_luci
+SYNCOBJECT2=$MIRROR2_DIR.sync
+
 
 if [ `find $DIR_PATCH -maxdepth 1 -name 'base.*.lmo' | wc -l` -eq 0 ]; then
 	return 0
 fi
 
-while true; do
-	STATE=`mkdir $SYNC_OBJ 2>&1`
-	if [[ "$STATE" != *"can't create"* ]]; then
-		break
-	fi
+for i in $(seq 1 45); do
+	mkdir $SYNCOBJECT1 &> /dev/null && break
 	sleep 1
 done
-
-if ! mount | grep -q ' on /usr/lib/lua/luci' ; then
-	mkdir -p /tmp/_usr_lib_lua_luci
-	cp -rf /usr/lib/lua/luci/* /tmp/_usr_lib_lua_luci/
-	mount --bind /tmp/_usr_lib_lua_luci /usr/lib/lua/luci
+if ! mount | grep -q " on $TARGET1_DIR" ; then
+	mkdir -p $MIRROR1_DIR
+	cp -rf $TARGET1_DIR/* $MIRROR1_DIR/
+	mount --bind $MIRROR1_DIR $TARGET1_DIR
 fi
-if ! mount | grep -q ' on /usr/lib/lua/luci' ; then
-	rm -rf $SYNC_OBJ
+if ! mount | grep -q " on $TARGET1_DIR" ; then
+	rm -rf $SYNCOBJECT1
 	return 1  # error
 fi
-if [ ! -f /tmp/_usr_lib_lua_luci/i18n.lua ]; then
-	rm -rf $SYNC_OBJ
+if [ ! -f $MIRROR1_DIR/xiaoqiang_version ]; then
+	rm -rf $SYNCOBJECT1
 	return 1  # error
 fi
 
-if ! mount | grep -q ' on /usr/share/xiaoqiang' ; then
-	mkdir -p /tmp/_usr_share_xiaoqiang
-	cp -rf /usr/share/xiaoqiang/* /tmp/_usr_share_xiaoqiang/
-	mount --bind /tmp/_usr_share_xiaoqiang /usr/share/xiaoqiang
+# unlock change luci.main.lang
+sed -i "s/option CHANNEL 'stable'/option CHANNEL 'release'/g" $TARGET1_DIR/xiaoqiang_version
+
+rm -rf $SYNCOBJECT1
+
+
+for i in $(seq 1 45); do
+	mkdir $SYNCOBJECT2 &> /dev/null && break
+	sleep 1
+done
+if ! mount | grep -q " on $TARGET2_DIR" ; then
+	mkdir -p $MIRROR2_DIR
+	cp -rf $TARGET2_DIR/* $MIRROR2_DIR/
+	mount --bind $MIRROR2_DIR $TARGET2_DIR
 fi
-if ! mount | grep -q ' on /usr/share/xiaoqiang' ; then
-	rm -rf $SYNC_OBJ
+if ! mount | grep -q " on $TARGET2_DIR" ; then
+	rm -rf $SYNCOBJECT2
 	return 1  # error
 fi
-if [ ! -f /tmp/_usr_share_xiaoqiang/xiaoqiang_version ]; then
-	rm -rf $SYNC_OBJ
+if [ ! -f $MIRROR2_DIR/i18n.lua ]; then
+	rm -rf $SYNCOBJECT2
 	return 1  # error
 fi
 
@@ -51,11 +67,10 @@ cp -f $DIR_PATCH/base.*.lmo /usr/lib/lua/luci/i18n/
 # unlock WEB lang menu
 sed -i 's/ and features\["system"\]\["i18n"\] == "1" //' /usr/lib/lua/luci/view/web/inc/sysinfo.htm
 
-# unlock change luci.main.lang
-sed -i "s/option CHANNEL 'stable'/option CHANNEL 'release'/g" /usr/share/xiaoqiang/xiaoqiang_version
+rm -rf $SYNCOBJECT2
+
 
-echo "lang patched" > /tmp/lang_patch.log
-rm -rf $SYNC_OBJ
+echo "lang patched" > $INST_FLAG_FN
 
 MAIN_LANG=$( uci -q get luci.main.lang )
 [ "$MAIN_LANG" == "" ] && uci set luci.main.lang=en
diff --git a/data/lang_uninstall.sh b/data/lang_uninstall.sh
index cc5be9d..f6ccca2 100644
--- a/data/lang_uninstall.sh
+++ b/data/lang_uninstall.sh
@@ -1,8 +1,18 @@
 #!/bin/sh
 
+INST_FLAG_FN=/tmp/lang_patch.log
+
 DIR_PATCH=/etc/crontabs/patches
 DIR_BACKUP=$DIR_PATCH/lang_backup
 
+TARGET1_DIR=/usr/share/xiaoqiang
+MIRROR1_DIR=/tmp/_usr_share_xiaoqiang
+SYNCOBJECT1=$MIRROR1_DIR.sync
+
+TARGET2_DIR=/usr/lib/lua/luci
+MIRROR2_DIR=/tmp/_usr_lib_lua_luci
+SYNCOBJECT2=$MIRROR2_DIR.sync
+
 if [ -d $DIR_BACKUP ]; then
 	if [ -f $DIR_BACKUP/fw_stable ]; then
 		sed -i "s/option CHANNEL 'release'/option CHANNEL 'stable'/g" /usr/share/xiaoqiang/xiaoqiang_version
@@ -28,7 +38,9 @@ uci commit firewall
 rm -rf $DIR_BACKUP
 rm -f $DIR_PATCH/lang_patch.sh
 rm -f $DIR_PATCH/base.*.lmo
-rm -f /tmp/lang_patch.log
+rm -f $INST_FLAG_FN
+rm -f $SYNCOBJECT1
+rm -f $SYNCOBJECT2
 
 luci-reload
 rm -f /tmp/luci-indexcache
diff --git a/install_lang.py b/install_lang.py
index f16d658..9a8d738 100644
--- a/install_lang.py
+++ b/install_lang.py
@@ -228,4 +228,5 @@ gw.run_cmd(f"rm -f {fn_remote} ; rm -f {fn_remote_i} ; rm -f {fn_remote_u}")
 if full_install:
     gw.run_cmd(f"rm -f {fn_www_remote}")
 
-print("Ready! The language files are installed.")
+prefix = '' if action == 'install' else 'un'
+print(f"Ready! The language files are {prefix}installed.")