diff --git a/usr.sbin/bsdconfig/bsdconfig.8 b/usr.sbin/bsdconfig/bsdconfig.8
--- a/usr.sbin/bsdconfig/bsdconfig.8
+++ b/usr.sbin/bsdconfig/bsdconfig.8
@@ -25,7 +25,7 @@
 .\"
 .\" $FreeBSD$
 .\"
-.Dd April 12, 2020
+.Dd April 1, 2022
 .Dt BSDCONFIG 8
 .Os
 .Sh NAME
@@ -254,3 +254,5 @@
 The docsinstall and diskmgmt modules call bsdinstall.
 Bugs found in these modules should be considered those of bsdinstall, not
 .Nm .
+If bsddialog is used like frontend a menu could hide the backtitle and the
+behavior with unicode characters is undefined.
diff --git a/usr.sbin/bsdconfig/networking/share/device.subr b/usr.sbin/bsdconfig/networking/share/device.subr
--- a/usr.sbin/bsdconfig/networking/share/device.subr
+++ b/usr.sbin/bsdconfig/networking/share/device.subr
@@ -248,6 +248,12 @@
 		local retval=$?
 		f_dialog_data_sanitize tag
 
+		# tag is not obtained via f_dialog_menutag_store() and
+		# f_dialog_menutag_fetch() so check here for bsddialog
+		if [ $DIALOG = "bsddialog" ]; then
+			f_replaceall "$tag" '"' "" tag
+		fi
+
 		if [ $retval -eq $DIALOG_HELP ]; then
 			f_show_help "$TCP_HELPFILE"
 			continue
diff --git a/usr.sbin/bsdconfig/networking/share/resolv.subr b/usr.sbin/bsdconfig/networking/share/resolv.subr
--- a/usr.sbin/bsdconfig/networking/share/resolv.subr
+++ b/usr.sbin/bsdconfig/networking/share/resolv.subr
@@ -472,6 +472,12 @@
 		local retval=$?
 		f_dialog_data_sanitize tag
 
+		# tag is not obtained via f_dialog_menutag_store() and
+		# f_dialog_menutag_fetch() so check here for bsddialog
+		if [ $DIALOG = "bsddialog" ]; then
+			f_replaceall "$tag" '"' "" tag
+		fi
+
 		# Return if "Cancel" was chosen (-1) or ESC was pressed (255)
 		if [ $retval -ne $DIALOG_OK ]; then
 			return $retval
diff --git a/usr.sbin/bsdconfig/share/dialog.subr b/usr.sbin/bsdconfig/share/dialog.subr
--- a/usr.sbin/bsdconfig/share/dialog.subr
+++ b/usr.sbin/bsdconfig/share/dialog.subr
@@ -51,8 +51,18 @@
 #
 # Default name of dialog(1) utility
 # NOTE: This is changed to "Xdialog" by the optional `-X' argument
+# TUI_UTLITY is used to allow some bsdinstall to use dialog, delete after the
+# replacement process.
 #
-DIALOG="dialog"
+# DIALOG="bsddialog"
+DIALOG=${TUI_UTILITY:-bsddialog}
+
+#
+# bsddialog does not provide --keep-tite dialog(1) and Xdialog could use it
+#
+if [ ! $DIALOG = "bsddialog" ]; then
+	WITH_KEEP_TITE=1
+fi
 
 #
 # Default dialog(1) title and backtitle text
@@ -74,15 +84,29 @@
 unset XDIALOG_INFOBOX_TIMEOUT
 
 #
-# Exit codes for [X]dialog(1)
+# Exit codes
 #
+BSDDIALOG_OK=0
+BSDDIALOG_CANCEL=1
+BSDDIALOG_HELP=2
+BSDDIALOG_EXTRA=3
+BSDDIALOG_ESC=5
+BSDDIALOG_ERROR=255
+
 DIALOG_OK=${SUCCESS:-0}
 DIALOG_CANCEL=${FAILURE:-1}
 DIALOG_HELP=2
 DIALOG_EXTRA=3
-DIALOG_ITEM_HELP=4
-export DIALOG_ERROR=254 # sh(1) can't handle the default of `-1'
-DIALOG_ESC=255
+
+if [ $DIALOG = "bsddialog" ]; then
+	DIALOG_ITEM_HELP=${BSDDIALOG_HELP} # unused by bsddialog
+	DIALOG_ERROR=${BSDDIALOG_ERROR}
+	DIALOG_ESC=${BSDDIALOG_ESC}
+else
+	DIALOG_ITEM_HELP=4
+	export DIALOG_ERROR=254 # sh(1) can't handle the default of `-1'
+	DIALOG_ESC=255
+fi
 
 #
 # Default behavior is to call f_dialog_init() automatically when loaded.
@@ -309,6 +333,11 @@
 			# usually "MaxSize: 24, 80"
 			__max_size="${__max_size#*: }"
 			f_replaceall "$__max_size" "," "" __max_size
+			if [ $DIALOG = "bsddialog" ] ; then
+				f_replaceall "$__max_size" "(" "" __max_size
+				f_replaceall "$__max_size" "-" "" __max_size
+				f_replaceall "$__max_size" ")" "" __max_size
+			fi
 		else
 			f_eval_catch -dk __max_size $funcname stty \
 				'stty size' || __max_size=
@@ -892,6 +921,14 @@
 	local __title="$4" __btitle="$5" __prompt="$6" __hline="$7"
 	shift 7 # var_height/var_width/var_rows/title/btitle/prompt/hline
 
+	if [ "$DIALOG" = "bsddialog" ]; then
+		# libbsddialog handles autosize with a prompt
+		setvar "$__var_height" 0
+		setvar "$__var_width" 0
+		setvar "$__var_rows" 0
+		return
+	fi
+
 	# Return unless at least one size aspect has been requested
 	[ "$__var_height" -o "$__var_width" -o "$__var_rows" ] ||
 		return $FAILURE
@@ -985,6 +1022,14 @@
 	local __title="$4" __btitle="$5" __prompt="$6" __hline="$7"
 	shift 7 # var_height/var_width/var_rows/title/btitle/prompt/hline
 
+	if [ "$DIALOG" = "bsddialog" ]; then
+		# libbsddialog handles autosize with a prompt
+		setvar "$__var_height" 0
+		setvar "$__var_width" 0
+		setvar "$__var_rows" 0
+		return
+	fi
+
 	# Return unless at least one size aspect has been requested
 	[ "$__var_height" -o "$__var_width" -o "$__var_rows" ] ||
 		return $FAILURE
@@ -1090,6 +1135,14 @@
 	local __title="$4" __btitle="$5" __prompt="$6" __hline="$7"
 	shift 7 # var_height/var_width/var_rows/title/btitle/prompt/hline
 
+	if [ "$DIALOG" = "bsddialog" ]; then
+		# libbsddialog handles autosize with a prompt
+		setvar "$__var_height" 0
+		setvar "$__var_width" 0
+		setvar "$__var_rows" 0
+		return
+	fi
+
 	# Return unless at least one size aspect has been requested
 	[ "$__var_height" -o "$__var_width" -o "$__var_rows" ] ||
 		return $FAILURE
@@ -1211,6 +1264,14 @@
 	local __title="$4" __btitle="$5" __prompt="$6" __hline="$7"
 	shift 7 # var_height/var_width/var_rows/title/btitle/prompt/hline
 
+	if [ "$DIALOG" = "bsddialog" ]; then
+		# libbsddialog handles autosize with a prompt
+		setvar "$__var_height" 0
+		setvar "$__var_width" 0
+		setvar "$__var_rows" 0
+		return
+	fi
+
 	# Return unless at least one size aspect has been requested
 	[ "$__var_height" -o "$__var_width" -o "$__var_rows" ] ||
 		return $FAILURE
@@ -1877,6 +1938,12 @@
 	# Sanitize the menutag before storing it if desired
 	[ "$sanitize" ] && f_dialog_data_sanitize text
 
+	# bsddialog quotes an item name if contains a space
+	if [ $DIALOG = "bsddialog" ]; then
+		# Actually only the first and last quote have to be removed
+		f_replaceall "$text" '"' "" text
+	fi
+
 	setvar DIALOG_MENU_$$ "$text"
 }
 
@@ -2230,7 +2297,8 @@
 	if ! f_have $DIALOG; then
 		unset USE_XDIALOG
 		local failed_dialog="$DIALOG"
-		DIALOG=dialog
+		#DIALOG=bsddialog
+		DIALOG=${TUI_UTILITY:-bsddialog}
 		f_die 1 "$msg_no_such_file_or_directory" "$pgm" "$failed_dialog"
 	fi
 
@@ -2262,7 +2330,8 @@
 		if ! f_have xauth; then
 			# Die gracefully, as we [likely] can't use Xdialog(1)
 			unset USE_XDIALOG
-			DIALOG=dialog
+			#DIALOG=bsddialog
+			DIALOG=${TUI_UTILITY:-bsddialog}
 			f_die 1 "$msg_no_such_file_or_directory" "$pgm" "xauth"
 		fi
 		HOSTNAME=$( hostname )
diff --git a/usr.sbin/bsdconfig/share/media/any.subr b/usr.sbin/bsdconfig/share/media/any.subr
--- a/usr.sbin/bsdconfig/share/media/any.subr
+++ b/usr.sbin/bsdconfig/share/media/any.subr
@@ -111,6 +111,11 @@
 		)
 		local retval=$?
 		f_dialog_data_sanitize mtag
+		# mtag is not obtained via f_dialog_menutag_store() and
+		# f_dialog_menutag_fetch() so check here for bsddialog
+		if [ $DIALOG = "bsddialog" ]; then
+			f_replaceall "$mtag" '"' "" mtag
+		fi
 		f_dprintf "retval=%s mtag=[%s]" $retval "$mtag"
 
 		if [ $retval -eq $DIALOG_HELP ]; then
diff --git a/usr.sbin/bsdconfig/share/media/wlan.subr b/usr.sbin/bsdconfig/share/media/wlan.subr
--- a/usr.sbin/bsdconfig/share/media/wlan.subr
+++ b/usr.sbin/bsdconfig/share/media/wlan.subr
@@ -1320,6 +1320,13 @@
 			2>&1 >&$DIALOG_TERMINAL_PASSTHRU_FD
 		) || break
 		f_dialog_data_sanitize menu_choice
+
+		# menu_choice is not obtained via f_dialog_menutag_store() and
+		# f_dialog_menutag_fetch() so check here for bsddialog
+		if [ $DIALOG = "bsddialog" ]; then
+			f_replaceall "$menu_choice" '"' "" menu_choice
+		fi
+
 		defaultitem="$menu_choice"
 
 		case "$menu_choice" in
diff --git a/usr.sbin/bsdconfig/share/packages/packages.subr b/usr.sbin/bsdconfig/share/packages/packages.subr
--- a/usr.sbin/bsdconfig/share/packages/packages.subr
+++ b/usr.sbin/bsdconfig/share/packages/packages.subr
@@ -489,7 +489,7 @@
 		--title \"\$DIALOG_TITLE\"         \
 		--backtitle \"\$DIALOG_BACKTITLE\" \
 		--hline \"\$hline\"                \
-		--keep-tite                        \
+		${WITH_KEEP_TITE:+--keep-tite}     \
 		--ok-label \"$msg_select\"         \
 		--cancel-label \"$msg_back\"       \
 		${SHOW_DESC:+--item-help}          \
diff --git a/usr.sbin/bsdconfig/startup/rcdelete b/usr.sbin/bsdconfig/startup/rcdelete
--- a/usr.sbin/bsdconfig/startup/rcdelete
+++ b/usr.sbin/bsdconfig/startup/rcdelete
@@ -215,7 +215,7 @@
 		--title \"\$DIALOG_TITLE\"         \
 		--backtitle \"\$DIALOG_BACKTITLE\" \
 		--hline \"\$hline\"                \
-		--keep-tite                        \
+		${WITH_KEEP_TITE:+--keep-tite}     \
 		--ok-label \"\$msg_ok\"            \
 		--cancel-label \"\$msg_cancel\"    \
 		--help-button                      \
diff --git a/usr.sbin/bsdconfig/startup/rcvar b/usr.sbin/bsdconfig/startup/rcvar
--- a/usr.sbin/bsdconfig/startup/rcvar
+++ b/usr.sbin/bsdconfig/startup/rcvar
@@ -143,7 +143,7 @@
 		--title \"\$DIALOG_TITLE\"         \
 		--backtitle \"\$DIALOG_BACKTITLE\" \
 		--hline \"\$hline\"                \
-		--keep-tite                        \
+		${WITH_KEEP_TITE:+--keep-tite}     \
 		--ok-label \"\$msg_ok\"            \
 		--cancel-label \"\$msg_cancel\"    \
 		${SHOW_DESC:+--item-help}          \
diff --git a/usr.sbin/bsdconfig/usermgmt/share/user_input.subr b/usr.sbin/bsdconfig/usermgmt/share/user_input.subr
--- a/usr.sbin/bsdconfig/usermgmt/share/user_input.subr
+++ b/usr.sbin/bsdconfig/usermgmt/share/user_input.subr
@@ -1086,7 +1086,7 @@
 		--ok-label \"\$msg_ok\"            \
 		--cancel-label \"\$msg_cancel\"    \
 		--default-item \"\$defaultitem\"   \
-		--keep-tite                        \
+		${WITH_KEEP_TITE:+--keep-tite}     \
 		--menu \"\$prompt\"                \
 		$height $width $rows               \
 		$menu_list                         \
@@ -1208,7 +1208,7 @@
 		--ok-label \"\$msg_ok\"            \
 		--cancel-label \"\$msg_cancel\"    \
 		--default-item \"\$defaultitem\"   \
-		--keep-tite                        \
+		${WITH_KEEP_TITE:+--keep-tite}     \
 		--menu \"\$prompt\"                \
 		$height $width $rows               \
 		$menu_list                         \
@@ -1322,7 +1322,7 @@
 		--ok-label \"\$msg_ok\"            \
 		--cancel-label \"\$msg_cancel\"    \
 		--default-item \"\$defaultitem\"   \
-		--keep-tite                        \
+		${WITH_KEEP_TITE:+--keep-tite}     \
 		--menu \"\$prompt\"                \
 		$height $width $rows               \
 		$menu_list                         \
diff --git a/usr.sbin/bsdinstall/scripts/auto b/usr.sbin/bsdinstall/scripts/auto
--- a/usr.sbin/bsdinstall/scripts/auto
+++ b/usr.sbin/bsdinstall/scripts/auto
@@ -29,6 +29,7 @@
 #
 ############################################################ INCLUDES
 
+TUI_UTILITY=dialog
 BSDCFG_SHARE="/usr/share/bsdconfig"
 . $BSDCFG_SHARE/common.subr || exit 1
 f_include $BSDCFG_SHARE/dialog.subr
diff --git a/usr.sbin/bsdinstall/scripts/bootconfig b/usr.sbin/bsdinstall/scripts/bootconfig
--- a/usr.sbin/bsdinstall/scripts/bootconfig
+++ b/usr.sbin/bsdinstall/scripts/bootconfig
@@ -30,6 +30,7 @@
 
 FREEBSD_BOOTLABEL="FreeBSD"
 
+TUI_UTILITY=dialog
 BSDCFG_SHARE="/usr/share/bsdconfig"
 . $BSDCFG_SHARE/common.subr || exit 1
 f_dprintf "%s: loading_includes..." "$0"
diff --git a/usr.sbin/bsdinstall/scripts/docsinstall b/usr.sbin/bsdinstall/scripts/docsinstall
--- a/usr.sbin/bsdinstall/scripts/docsinstall
+++ b/usr.sbin/bsdinstall/scripts/docsinstall
@@ -29,6 +29,7 @@
 #
 ############################################################ INCLUDES
 
+TUI_UTILITY=dialog
 BSDCFG_SHARE="/usr/share/bsdconfig"
 . $BSDCFG_SHARE/common.subr || exit 1
 f_dprintf "%s: loading includes..." "$0"
diff --git a/usr.sbin/bsdinstall/scripts/hostname b/usr.sbin/bsdinstall/scripts/hostname
--- a/usr.sbin/bsdinstall/scripts/hostname
+++ b/usr.sbin/bsdinstall/scripts/hostname
@@ -29,6 +29,7 @@
 #
 ############################################################ INCLUDES
 
+TUI_UTILITY=dialog
 BSDCFG_SHARE="/usr/share/bsdconfig"
 . $BSDCFG_SHARE/common.subr || exit 1
 f_dprintf "%s: loading_includes..." "$0"
diff --git a/usr.sbin/bsdinstall/scripts/jail b/usr.sbin/bsdinstall/scripts/jail
--- a/usr.sbin/bsdinstall/scripts/jail
+++ b/usr.sbin/bsdinstall/scripts/jail
@@ -29,6 +29,7 @@
 #
 ############################################################ INCLUDES
 
+TUI_UTILITY=dialog
 BSDCFG_SHARE="/usr/share/bsdconfig"
 . $BSDCFG_SHARE/common.subr || exit 1
 
diff --git a/usr.sbin/bsdinstall/scripts/keymap b/usr.sbin/bsdinstall/scripts/keymap
--- a/usr.sbin/bsdinstall/scripts/keymap
+++ b/usr.sbin/bsdinstall/scripts/keymap
@@ -29,6 +29,7 @@
 #
 ############################################################ INCLUDES
 
+TUI_UTILITY=dialog
 BSDCFG_SHARE="/usr/share/bsdconfig"
 . $BSDCFG_SHARE/common.subr || exit 1
 f_dprintf "%s: loading includes..." "$0"
diff --git a/usr.sbin/bsdinstall/scripts/netconfig_ipv4 b/usr.sbin/bsdinstall/scripts/netconfig_ipv4
--- a/usr.sbin/bsdinstall/scripts/netconfig_ipv4
+++ b/usr.sbin/bsdinstall/scripts/netconfig_ipv4
@@ -29,6 +29,7 @@
 #
 ############################################################ INCLUDES
 
+TUI_UTILITY=dialog
 BSDCFG_SHARE="/usr/share/bsdconfig"
 . $BSDCFG_SHARE/common.subr || exit 1
 f_dprintf "%s: loading includes..." "$0"
diff --git a/usr.sbin/bsdinstall/scripts/netconfig_ipv6 b/usr.sbin/bsdinstall/scripts/netconfig_ipv6
--- a/usr.sbin/bsdinstall/scripts/netconfig_ipv6
+++ b/usr.sbin/bsdinstall/scripts/netconfig_ipv6
@@ -33,6 +33,7 @@
 #
 ############################################################ INCLUDES
 
+TUI_UTILITY=dialog
 BSDCFG_SHARE="/usr/share/bsdconfig"
 . $BSDCFG_SHARE/common.subr || exit 1
 f_dprintf "%s: loading includes..." "$0"
diff --git a/usr.sbin/bsdinstall/scripts/script b/usr.sbin/bsdinstall/scripts/script
--- a/usr.sbin/bsdinstall/scripts/script
+++ b/usr.sbin/bsdinstall/scripts/script
@@ -29,6 +29,7 @@
 #
 ############################################################ INCLUDES
 
+TUI_UTILITY=dialog
 BSDCFG_SHARE="/usr/share/bsdconfig"
 . $BSDCFG_SHARE/common.subr || exit 1
 f_dprintf "%s: loading includes..." "$0"
diff --git a/usr.sbin/bsdinstall/scripts/wlanconfig b/usr.sbin/bsdinstall/scripts/wlanconfig
--- a/usr.sbin/bsdinstall/scripts/wlanconfig
+++ b/usr.sbin/bsdinstall/scripts/wlanconfig
@@ -29,6 +29,7 @@
 #
 ############################################################ INCLUDES
 
+TUI_UTILITY=dialog
 BSDCFG_SHARE="/usr/share/bsdconfig"
 . $BSDCFG_SHARE/common.subr || exit 1
 f_include $BSDCFG_SHARE/dialog.subr
diff --git a/usr.sbin/bsdinstall/scripts/zfsboot b/usr.sbin/bsdinstall/scripts/zfsboot
--- a/usr.sbin/bsdinstall/scripts/zfsboot
+++ b/usr.sbin/bsdinstall/scripts/zfsboot
@@ -29,6 +29,7 @@
 #
 ############################################################ INCLUDES
 
+TUI_UTILITY=dialog
 BSDCFG_SHARE="/usr/share/bsdconfig"
 . $BSDCFG_SHARE/common.subr || exit 1
 f_dprintf "%s: loading includes..." "$0"