diff --git a/api.lua b/api.lua
index 641b4ea..a5fd793 100644
--- a/api.lua
+++ b/api.lua
@@ -19,10 +19,23 @@ local plants = {
 	["morefarming:seed_carrot"]="air", ["morefarming:seed_corn"]="air",
 }
 
+areas.registered_protection_conditions = {}
 areas.registered_on_adds = {}
 areas.registered_on_removes = {}
 areas.registered_on_moves = {}
 
+areas.callback_origins = {}
+
+function areas:registerProtectionCondition(func)
+	table.insert(areas.registered_protection_conditions, func)
+	local debug_info = debug.getinfo(func, "S")
+	areas.callback_origins[func] = {
+		mod = core.get_current_modname() or "??",
+		source = debug_info.short_src or "??",
+		line = debug_info.linedefined or "??"
+	}
+end
+
 function areas:registerOnAdd(func)
 	table.insert(areas.registered_on_adds, func)
 end
@@ -101,56 +114,75 @@ function areas:getAreasIntersectingArea(pos1, pos2)
 	return res
 end
 
--- Checks if the area is unprotected or owned by you
+-- Returns smallest area at position and its id or nil.
+-- If multiple areas have the same volume, larger id takes precedence.
+function areas:getSmallestAreaAtPos(pos)
+	local smallest_area, smallest_id, volume
+	local smallest_volume = math.huge
+	for id, area in pairs(self:getAreasAtPos(pos)) do
+		volume =	(area.pos2.x - area.pos1.x + 1)
+					* (area.pos2.y - area.pos1.y + 1)
+					* (area.pos2.z - area.pos1.z + 1)
+		if smallest_volume >= volume then
+			smallest_area = area
+			smallest_id = id
+			smallest_volume = volume
+		end
+	end
+	return smallest_area, smallest_id
+end
+
+-- Checks if the area is unprotected, open, owned by player
+-- or player is part of faction of smallest area at position.
 function areas:canInteract(pos, name)
 	if minetest.check_player_privs(name, self.adminPrivs) then
 		return true
 	end
-	local owned = false
-	for _, area in pairs(self:getAreasAtPos(pos)) do
-		if area.owner == name or area.open then
-			return true
-		end
-		if area.openfarming then
-			-- if area is openfarming
-			local player = minetest.get_player_by_name(name)
-			local node = minetest.get_node(pos).name
-			if player and minetest.registered_nodes[node] then
-				local wstack = player:get_wielded_item():get_name()
-				if wstack == "" then wstack = "hand" end
+	local area = self:getSmallestAreaAtPos(pos)
+	-- No area, player owns it or area is open
+	if not area
+		or area.owner == name
+		or area.open
+	then
+		return true
+	elseif area.openfarming then
+		-- if area is openfarming
+		local player = minetest.get_player_by_name(name)
+		local node = minetest.get_node(pos).name
+		if player and minetest.registered_nodes[node] then
+			local wstack = player:get_wielded_item():get_name()
+			if wstack == "" then wstack = "hand" end
 
-				--on_dig
-				if minetest.get_item_group(node, "plant") == 1 and (wstack == "hand" or minetest.registered_tools[wstack]) then
-					return true
-				end
+			--on_dig
+			if minetest.get_item_group(node, "plant") == 1 and (wstack == "hand" or minetest.registered_tools[wstack]) then
+				return true
+			end
 
-				--on_place
-				if plants[wstack] ~= nil and plants[wstack] == node then
-					return true
-				end
+			--on_place
+			if plants[wstack] ~= nil and plants[wstack] == node then
+				return true
 			end
 		end
-		if areas.factions_available and area.faction_open then
-			if (factions.version or 0) < 2 then
-				local faction_name = factions.get_player_faction(name)
-				if faction_name then
-					for _, fname in ipairs(area.faction_open or {}) do
-						if faction_name == fname then
-							return true
-						end
-					end
-				end
-			else
+	end
+	elseif areas.factions_available and area.faction_open then
+		if (factions.version or 0) < 2 then
+			local faction_name = factions.get_player_faction(name)
+			if faction_name then
 				for _, fname in ipairs(area.faction_open or {}) do
-					if factions.player_is_in_faction(fname, name) then
+					if faction_name == fname then
 						return true
 					end
 				end
 			end
+		else
+			for _, fname in ipairs(area.faction_open or {}) do
+				if factions.player_is_in_faction(fname, name) then
+					return true
+				end
+			end
 		end
-		owned = true
 	end
-	return not owned
+	return false
 end
 
 -- Returns a table (list) of all players that own an area
diff --git a/api.md b/api.md
index e243a8a..1b38b14 100644
--- a/api.md
+++ b/api.md
@@ -5,11 +5,27 @@ API list
 ---
 
  * `areas:registerHudHandler(handler)` - Registers a handler to add items to the Areas HUD.  See [HUD](#hud).
+ * `areas:registerProtectionCondition(func(pos1, pos2, name))` - 
+See [Protection Conditions](#Protection-Conditions)
  * `areas:registerOnAdd(func(id, area))`
  * `areas:registerOnRemove(func(id))`
  * `areas:registerOnMove(func(id, area, pos1, pos2))`
 
 
+Protection Conditions
+---
+
+With `areas:registerProtectionCondition(func(pos1, pos2, name))`
+you can register rules to control whether to allow or prohibit the creation of an area.
+
+Return values:
+* `true` Forcefully allows the area creation. This overwrites the outcome of any
+  previously executed conditions, including the default ones registered by this mod.
+* `false, errMsg` Disable the creation of the area and return an error message.
+* `nil` (or no return value) Enable the creation of the area,
+  unless specified otherwise by the other registered callbacks.
+
+
 HUD
 ---
 
diff --git a/chatcommands.lua b/chatcommands.lua
index eabb908..4a595b8 100644
--- a/chatcommands.lua
+++ b/chatcommands.lua
@@ -173,13 +173,46 @@ minetest.register_chatcommand("find_areas", {
 
 
 minetest.register_chatcommand("list_areas", {
-	description = S("List your areas, or all areas if you are an admin."),
+	params = S("[<name>]"),
+	description = S("List your areas. Admins can list all areas or those of a specific player."),
 	func = function(name, param)
 		local admin = minetest.check_player_privs(name, areas.adminPrivs)
+		local admin_show_summary = admin
+		local owner_name = name
+
+		if admin and #param > 0 then
+			owner_name = param
+			admin_show_summary = false
+		end
+
 		local areaStrings = {}
-		for id, area in pairs(areas.areas) do
-			if admin or areas:isAreaOwner(id, name) then
-				table.insert(areaStrings, areas:toString(id))
+		if admin_show_summary then
+			-- Summary per-player
+			local indices = {}
+			local counts = {} -- { [1] = name, [2] = count }, ...
+			for _, area in pairs(areas.areas) do
+				local i = indices[area.owner]
+				if i then
+					counts[i][2] = counts[i][2] + 1
+				else
+					table.insert(counts, { area.owner, 1 })
+					indices[area.owner] = #counts
+				end
+			end
+			-- Alphabatical name sorting
+			table.sort(counts, function (kv_a, kv_b)
+				return kv_a[1] < kv_b[1]
+			end)
+			--  Output
+			for _, kv in ipairs(counts) do
+				table.insert(areaStrings, S("@1 : @2 area(s)", kv[1], kv[2]))
+			end
+		else
+			-- Detailed list
+			for id, area in pairs(areas.areas) do
+				if areas:isAreaOwner(id, owner_name) then
+					table.insert(areaStrings, areas:toString(id))
+				end
 			end
 		end
 		if #areaStrings == 0 then
diff --git a/hud.lua b/hud.lua
index 1b62dbb..c6bea81 100644
--- a/hud.lua
+++ b/hud.lua
@@ -66,7 +66,7 @@ minetest.register_globalstep(function(dtime)
 			hud = {}
 			areas.hud[name] = hud
 			hud.areasId = player:hud_add({
-				hud_elem_type = "text",
+				[minetest.features.hud_def_type_field and "type" or "hud_elem_type"] = "text", -- compatible with older versions
 				name = "Areas",
 				number = 0xFFFFFF,
 				position = {x=0, y=1},
diff --git a/internal.lua b/internal.lua
index 559576f..79330b5 100644
--- a/internal.lua
+++ b/internal.lua
@@ -206,62 +206,93 @@ function areas:getChildren(id)
 	return children
 end
 
--- Checks if the user has sufficient privileges.
--- If the player is not a administrator it also checks
--- if the area intersects other areas that they do not own.
--- Also checks the size of the area and if the user already
--- has more than max_areas.
+-- checks all possible restrictions registered with
+-- areas:registerProtectionCondition
+-- builtin callbacks below
 function areas:canPlayerAddArea(pos1, pos2, name)
+	local allowed = true
+	local errMsg
+	for i=1, #areas.registered_protection_conditions do
+		local res, msg = areas.registered_protection_conditions[i](pos1, pos2, name)
+		if res == true then
+			-- always allow to protect, no matter of other conditions
+			return true
+		elseif res == false then
+			-- there might be another callback that returns true, so we can't break here
+			allowed = false
+			-- save the first error that occurred
+			errMsg = errMsg or msg
+		elseif res ~= nil then
+			local origin = areas.callback_origins[areas.registered_protection_conditions[i]]
+			error("\n[Mod] areas: Invalid api usage from mod '" ..
+					origin.mod .. "' in callback registerProtectionCondition() at " ..
+					origin.source .. ":" .. origin.line)
+		end
+	end
+
+	return allowed, errMsg
+end
+
+-- Checks if the user has sufficient privileges.
+areas:registerProtectionCondition(function(pos1, pos2, name)
 	local privs = minetest.get_player_privs(name)
 	if privs.areas then
+		-- always allow administrators to create areas
 		return true
 	end
 
-	-- Check self protection privilege, if it is enabled,
-	-- and if the area is too big.
-	if not self.config.self_protection or
+	-- Check self protection privilege
+	if not areas.config.self_protection or
 			not privs[areas.config.self_protection_privilege] then
 		return false, S("Self protection is disabled or you do not have"
 				.." the necessary privilege.")
 	end
+end)
 
-	-- MFF: megabuilders skip checks on size and number of areas
-	if not privs.megabuilder then
+-- check if the area is too big
+-- NALC: megabuilders skip checks on size and number of areas
+areas:registerProtectionCondition(function(pos1, pos2, name)
+	local privs = minetest.get_player_privs(name)
+	if not privs.megabuilder then	
 		local max_size = privs.areas_high_limit and
-			self.config.self_protection_max_size_high or
-			self.config.self_protection_max_size
+			areas.config.self_protection_max_size_high or
+			areas.config.self_protection_max_size
 		if
-			(pos2.x - pos1.x) > max_size.x or
-			(pos2.y - pos1.y) > max_size.y or
-			(pos2.z - pos1.z) > max_size.z then
-				return false, S("Area is too big.")
+			(pos2.x - pos1.x + 1) > max_size.x or
+			(pos2.y - pos1.y + 1) > max_size.y or
+			(pos2.z - pos1.z + 1) > max_size.z then
+			return false, S("Area is too big.")
 		end
 	end
+end)
 
-		-- Check number of areas the user has and make sure it not above the max
-		local count = 0
-		for _, area in pairs(self.areas) do
-			if area.owner == name then
-				count = count + 1
-			end
+-- Check number of areas the user has and make sure it not above the max
+areas:registerProtectionCondition(function(pos1, pos2, name)
+	local privs = minetest.get_player_privs(name)
+	local count = 0
+	for _, area in pairs(areas.areas) do
+		if area.owner == name then
+			count = count + 1
 		end
-		local max_areas = privs.areas_high_limit and
-			self.config.self_protection_max_areas_high or
-			self.config.self_protection_max_areas
+	end
+	local max_areas = privs.areas_high_limit and
+			areas.config.self_protection_max_areas_high or
+			areas.config.self_protection_max_areas
 	if count >= max_areas then
 		return false, S("You have reached the maximum amount of"
 				.." areas that you are allowed to protect.")
 	end
+end)
 
-	-- Check intersecting areas
-	local can, id = self:canInteractInArea(pos1, pos2, name)
+-- checks if the area intersects other areas that the player do not own.
+areas:registerProtectionCondition(function(pos1, pos2, name)
+	local can, id = areas:canInteractInArea(pos1, pos2, name)
 	if not can then
-		local area = self.areas[id]
+		local area = areas.areas[id]
 		return false, S("The area intersects with @1 [@2] (@3).",
 				area.name, id, area.owner)
 	end
-	return true
-end
+end)
 
 -- Given a id returns a string in the format:
 -- "name [id]: owner (x1, y1, z1) (x2, y2, z2) -> children"
diff --git a/locale/areas.fr.tr b/locale/areas.fr.tr
index bbbc089..b60726c 100644
--- a/locale/areas.fr.tr
+++ b/locale/areas.fr.tr
@@ -133,3 +133,5 @@ Set area protection region, position 1, or position 2 by punching nodes, or disp
 The area @1 does not exist.=La zone @1 n’existe pas.
 Unable to get position.=Impossible d’obtenir la position.
 Unknown subcommand: @1=Sous-commande inconnue : @1
+
+Relative coordinates is not supported on this server. Please upgrade Minetest to 5.7.0 or newer versions.=
diff --git a/locale/areas.it.tr b/locale/areas.it.tr
index 006b04d..7fe77da 100644
--- a/locale/areas.it.tr
+++ b/locale/areas.it.tr
@@ -133,3 +133,5 @@ Set area protection region, position 1, or position 2 by punching nodes, or disp
 The area @1 does not exist.=L'area @1 non esiste.
 Unable to get position.=Impossibile ottenere la posizione.
 Unknown subcommand: @1=Sotto-comando sconosciuto: @1
+
+Relative coordinates is not supported on this server. Please upgrade Minetest to 5.7.0 or newer versions.=
diff --git a/locale/areas.ru.tr b/locale/areas.ru.tr
new file mode 100644
index 0000000..11e8c74
--- /dev/null
+++ b/locale/areas.ru.tr
@@ -0,0 +1,137 @@
+# textdomain: areas
+
+
+
+### chatcommands.lua ###
+
+<AreaName>=<имя_территории>
+<ID> [faction_name]=<ID> [имя_фракции]
+<NewOwner>=<новый_владелец>
+<ParentID>=<ID_родительской>
+<PlayerName>=<имя_игрока>
+<newName>=<новое_имя>
+@1 has given you control over the area "@2" (ID @3).=@1 передал вам территорию "@2" (ID @3).
+@1 spanning up to @2x@3x@4.=@1 размером до @2x@3x@4.
+A regular expression is required.=Не указано регулярное выражение.
+Area @1 does not exist or is not owned by you.=Территория @1 не существует или Вы не имеете к ней доступа.
+Area closed for faction members.=Территория закрыта для игроков из фракций.
+Area closed.=Территория закрыта.
+Area does not exist.=Территория не существует.
+Area is open for members of: @1=Территория открыта для игроков из фракций: @1
+Area opened.=Территория открыта.
+Area protected. ID: @1=Территория защищена. ID: @1
+Area renamed.=Территория переименована.
+Area successfully moved.=Территория успешно перенесена.
+Change the owner of an area using its ID=Изменить владельца территории по её ID
+Faction doesn't exists=Фракция не существует.
+Find areas using a Lua regular expression=Поиск территорий с использованием регулярных выражений Lua
+Get information about area configuration and usage.=Получить информацию о конфигурации и использовании защиты территорий.
+
+Give a player access to a sub-area between two positions that have already been protected, Use set_owner if you don't want the parent to be set.=Дать игроку доступ к выделенной территории, создав дополнительный регион. Используйте set_owner, если вы не хотите привязки к родительской территории.
+
+Invalid regular expression.=Неверное регулярное выражение.
+Limit: @1 areas=Ограничение: @1 территорий(я)
+Limit: no area count limit=Ограничение: нет ограничений на кол-во территорий
+List your areas, or all areas if you are an admin.=Вывести список доступных Вам территорий или всех существующих территорий, если вы администратор.
+Move (or resize) an area to the current positions.=Переместить (или изменить размер) территории.
+No matches found.=Совпадений не найдено.
+No visible areas.=Нет доступных территорий.
+Owner changed.=Владелец изменён.
+Players with the "@1" privilege can protect up to @2 areas=Игроки, имеющие привилегию "@1" могут защищать до @2 территорий
+
+Protect an area between two positions and give a player access to it without setting the parent of the area to any existing area=Защитить территорию между двумя позициями и дать игроку доступ к ней без привязки к родительскому региону.
+
+Protect your own area=Защитить вашу территорию
+Recursively remove areas using an ID=Рекурсивное удаление территорий (вместе с дочерними) по его ID
+Remove an area using an ID=Удаление территории по его ID
+Removed area @1=Удалена территория @1
+Removed area @1 and its sub areas.=Удалена территория @1 и её дочерние территории.
+Removes all ownerless areas=Удалить все бесхозные территории (без владельца)
+Rename an area that you own=Переименовать территорию, которой вы владеете.
+Self protection is disabled.=Защита своих территорий отключена.
+Self protection is enabled.=Защита своих территорий включена.
+That area doesn't exist.=Территория не существует.
+The player "@1" does not exist.=Игрок "@1" не существует.
+Toggle an area open (anyone can interact) or closed=Открыть/закрыть территорию для других игроков
+Toggle an area open/closed for members in your faction.=Открыть/закрыть территорию для игроков вашей фракции.
+You are an area administrator ("areas" privilege).=Вы можете управлять всеми территориями (привилегия "areas")
+You can protect areas=Вы можете защищать территории
+You can't protect that area.=Вы не можете установить защиту на эту территорию.
+You can't protect that area: @1=Вы не можете установить защиту на территорию: @1
+You don't have the necessary privilege ("@1").=У Вас нет необходимой привилегии ("@1").
+You don't own that area.=Вы не являетесь владельцем этой территории.
+You have @1 areas.=У вас @1 территорий.
+
+You have been granted control over area #@1. Type /list_areas to show your areas.=Вам выдан доступ к территории #@1.
+
+You have extended area protection limits ("areas_high_limit" privilege).=У вас увеличенный лимит на кол-во создаваемых вами защищённых территорий
+
+You have the necessary privilege ("@1").=У вас есть необходимая привилегия ("@1").
+You need to select an area first.=Сначала необходимо выделить территорию.
+
+### chatcommands.lua ###
+### pos.lua ###
+
+<ID>=
+Invalid usage, see /help @1.=Неверное использование, см. /help @1.
+
+### hud.lua ###
+
+:open=:открытая
+Areas:=Территории:
+
+### init.lua ###
+
+Can administer areas.=Может управлять территориями.
+Can protect areas.=Может создавать защищённые территории.
+Can protect more, bigger areas.=Может создавать защищённые территории больше территорий и с бОльшим размером.
+
+### interact.lua ###
+
+@1 is protected by @2.=@1 - принадлежит @2.
+
+### internal.lua ###
+
+Area is too big.=Территория слишком велика.
+
+Self protection is disabled or you do not have the necessary privilege.=Возможность защиты территорий отключена или же Вы не имеете необходимых привилегий.
+
+The area intersects with @1 [@2] (@3).=Территория пересекается с @1 [@2] (@3).
+
+You have reached the maximum amount of areas that you are allowed to protect.=Вы достигли максимально допустимого количества на создание защищённых территорий.
+
+
+### legacy.lua ###
+
+<version>=<версия>
+Converted areas saved. Done.=Готово. Сконвертированные территории сохранены.
+Converting areas…=Конвертирование территорий…
+Error loading legacy file: @1=Ошибка загрузки файла с устаревшим форматом: @1
+Invalid version number. (0 allowed)=Неверный номер версии. (поддерживается 0)
+Legacy file loaded.=Файл с устаревшим форматом загружен.
+
+Loads, converts, and saves the areas from a legacy save file.=Загружает, конвертирует и сохраняет территории из файла с устаревшим форматом.
+
+Table format updated.=Формат обновлён.
+unnamed=без_названия
+
+### pos.lua ###
+
+<not set>=<не_установлена>
+Area @1 selected.=Территория @1 выбрана.
+Area position @1 set to @2=Позиция @1 установлена в @2
+Position @1 set to @2=Позиция @1 установлена в @2
+Position @1: =Позиция @1:
+Select an area by ID.=Выбрать территорию по её ID.
+Select position @1 by punching a node.=Установите позицию @1, ударив по блоку.
+Select positions by punching two nodes.=Установите позиции, ударив по двум блокам.
+
+Set area protection region position @1 to your location or the one specified=Установить позицию @1 для выбора защищаемой территории
+
+Set area protection region, position 1, or position 2 by punching nodes, or display the region=Установить позиции 1 и/или 2, ударяя по блокам, или вывести ранее установленные позиции
+
+The area @1 does not exist.=Территория @1 не существует.
+Unable to get position.=Не удалось получить позицию.
+Unknown subcommand: @1=Неизвестная под-команда/аргумент.
+
+Relative coordinates is not supported on this server. Please upgrade Minetest to 5.7.0 or newer versions.=
diff --git a/locale/areas.zh_CN.tr b/locale/areas.zh_CN.tr
new file mode 100644
index 0000000..2ac2be1
--- /dev/null
+++ b/locale/areas.zh_CN.tr
@@ -0,0 +1,137 @@
+# textdomain: areas
+
+
+
+### chatcommands.lua ###
+
+<AreaName>=<保护区名称>
+<ID> [faction_name]=<保护区编号> [派系名称]
+<NewOwner>=<新拥有者>
+<ParentID>=<上级保护区编号>
+<PlayerName>=<玩家名称>
+<newName>=<新名称>
+@1 has given you control over the area "@2" (ID @3).=@1 已将保护区“@2”（编号 @3）的控制权交与您。
+@1 spanning up to @2x@3x@4.=@1，最大为 @2x@3x@4。
+A regular expression is required.=需要正则表达式。
+Area @1 does not exist or is not owned by you.=保护区 @1 不存在，或并非由您拥有。
+Area closed for faction members.=保护区已对派系成员关闭。
+Area closed.=保护区已关闭。
+Area does not exist.=保护区不存在。
+Area is open for members of: @1=保护区已对以下派系的成员开放：@1
+Area opened.=保护区已开放。
+Area protected. ID: @1=成功进行保护。 保护区编号：@1
+Area renamed.=保护区已重新命名。
+Area successfully moved.=成功移动保护区。
+Change the owner of an area using its ID=通过保护区编号改变其拥有者
+Faction doesn't exists=派系不存在
+Find areas using a Lua regular expression=使用 Lua 正则表达式寻找保护区
+Get information about area configuration and usage.=获得保护区配置与使用的资讯。
+
+Give a player access to a sub-area between two positions that have already been protected, Use set_owner if you don't want the parent to be set.=授予其他玩家已有保护区内一部分地方、两个座标之间区域的的存取权。如果不想上级保护区被设定，请使用 /set_owner。
+
+Invalid regular expression.=正则表达式无效。
+Limit: @1 areas=限制：@1个保护区
+Limit: no area count limit=限制：无数量限制
+List your areas, or all areas if you are an admin.=列出您拥有的保护区，或对于管理员而言，列出所有保护区。
+Move (or resize) an area to the current positions.=移动一保护区至目前座标，或改变其大小。
+No matches found.=找不到匹配项。
+No visible areas.=没有保护区可供查阅。
+Owner changed.=拥有者已修改。
+Players with the "@1" privilege can protect up to @2 areas=拥有“@1”权限的玩家最多可以保护 @2 个保护区
+
+Protect an area between two positions and give a player access to it without setting the parent of the area to any existing area=授予其他玩家两个座标之间区域的控制权，而不设定上级保护区
+
+Protect your own area=对您自己的地区施加保护
+Recursively remove areas using an ID=通过保护区编号移除保护区以及其所有子保护区
+Remove an area using an ID=通过保护区编号移除一保护区
+Removed area @1=保护区 @1 已移除
+Removed area @1 and its sub areas.=保护区 @1 以及其所有子保护区已移除。
+Removes all ownerless areas=移除所有无主保护区
+Rename an area that you own=重新命名您拥有的保护区
+Self protection is disabled.=自我保护被禁用。
+Self protection is enabled.=自我保护被启用。
+That area doesn't exist.=保护区不存在。
+The player "@1" does not exist.=玩家“@1”不存在。
+Toggle an area open (anyone can interact) or closed=切换保护区开放状态（如开放，所有玩家均可互动）
+Toggle an area open/closed for members in your faction.=切换保护区对派系成员的开放状态
+You are an area administrator ("areas" privilege).=您是保护区管理员（拥有“area”权限）
+You can protect areas=您可以建立保护区
+You can't protect that area.=您无法保护该区域。
+You can't protect that area: @1=您无法保护该区域：@1
+You don't have the necessary privilege ("@1").=您没有所需权限（“@1”）
+You don't own that area.=您并不拥有该保护区。
+You have @1 areas.=您有 @1 个保护区。
+
+You have been granted control over area #@1. Type /list_areas to show your areas.=您已被授予保护区 #@1 的控制权。 使用 /list_areas 以查看您的保护区。
+
+You have extended area protection limits ("areas_high_limit" privilege).=您拥有延伸保护权限（拥有“areas_high_limit”权限）
+
+You have the necessary privilege ("@1").=您拥有所需权限（“@1”）
+You need to select an area first.=请先选择范围。
+
+### chatcommands.lua ###
+### pos.lua ###
+
+<ID>=<保护区编号>
+Invalid usage, see /help @1.=无效用法，请参见 /help @1。
+
+### hud.lua ###
+
+:open=:开放
+Areas:=保护区：
+
+### init.lua ###
+
+Can administer areas.=可以管理保护区
+Can protect areas.=可以进行保护
+Can protect more, bigger areas.=进行保护时，数量以及体积上限提高。
+
+### interact.lua ###
+
+@1 is protected by @2.=@1 被 @2 保护。
+
+### internal.lua ###
+
+Area is too big.=区域过大。
+
+Self protection is disabled or you do not have the necessary privilege.=自我保护被禁用，或您没有所需权限。
+
+The area intersects with @1 [@2] (@3).=区域与 @1 [@2] (@3) 重叠。
+
+You have reached the maximum amount of areas that you are allowed to protect.=您的现有保护区数量已达到所允许的上限。
+
+
+### legacy.lua ###
+
+<version>=<版本>
+Converted areas saved. Done.=转换后的保护区已经保存。 完成。
+Converting areas…=正在转换保护区……
+Error loading legacy file: @1=载入旧档案时发生错误：@1
+Invalid version number. (0 allowed)=无效版本号。（允许值：0）
+Legacy file loaded.=旧档案已载入。
+
+Loads, converts, and saves the areas from a legacy save file.=载入、转换并储存旧存档中的保护区。
+
+Table format updated.=表格格式已更新。
+unnamed=未命名
+
+### pos.lua ###
+
+<not set>=<未设定>
+Area @1 selected.=保护区 @1 已选择。
+Area position @1 set to @2=保护区座标 @1 已设定为 @2。
+Position @1 set to @2=保护区座标 @1 已设定为 @2。
+Position @1: =保护区座标 @1：
+Select an area by ID.=通过保护区编号选择区域
+Select position @1 by punching a node.=请击打方块以设定保护区座标 @1 的位置。
+Select positions by punching two nodes.=请击打两个方块，以设定保护区座标的位置。
+
+Set area protection region position @1 to your location or the one specified=将保护区座标 @1 的位置设定为您目前的位置或提供的座标
+
+Set area protection region, position 1, or position 2 by punching nodes, or display the region=击打方块设定保护区座标，或获得其座标资讯
+
+The area @1 does not exist.=保护区 @1 不存在。
+Unable to get position.=无法获得座标。
+Unknown subcommand: @1=子指令不明：@1
+
+Relative coordinates is not supported on this server. Please upgrade Minetest to 5.7.0 or newer versions.=此服务器不支援相对座标。请更新Minetest至5.7.0或之后的版本。
\ No newline at end of file
diff --git a/locale/areas.zh_TW.tr b/locale/areas.zh_TW.tr
new file mode 100644
index 0000000..4a2c33f
--- /dev/null
+++ b/locale/areas.zh_TW.tr
@@ -0,0 +1,137 @@
+# textdomain: areas
+
+
+
+### chatcommands.lua ###
+
+<AreaName>=<保護區名稱>
+<ID> [faction_name]=<保護區編號> [派系名稱]
+<NewOwner>=<新擁有者>
+<ParentID>=<上級保護區編號>
+<PlayerName>=<玩家名稱>
+<newName>=<新名稱>
+@1 has given you control over the area "@2" (ID @3).=@1 已將保護區「@2」（編號 @3）的控制權交與您。
+@1 spanning up to @2x@3x@4.=@1，最大爲 @2x@3x@4。
+A regular expression is required.=需要正則表達式。
+Area @1 does not exist or is not owned by you.=保護區 @1 不存在，或並非由您擁有。
+Area closed for faction members.=保護區已對派系成員關閉。
+Area closed.=保護區已關閉。
+Area does not exist.=保護區不存在。
+Area is open for members of: @1=保護區已對以下派系的成員開放：@1
+Area opened.=保護區已開放。
+Area protected. ID: @1=成功進行保護。保護區編號：@1
+Area renamed.=保護區已重新命名。
+Area successfully moved.=成功移動保護區。
+Change the owner of an area using its ID=通過保護區編號改變其擁有者
+Faction doesn't exists=派系不存在
+Find areas using a Lua regular expression=使用 Lua 正則表達式尋找保護區
+Get information about area configuration and usage.=獲得保護區配置與使用的資訊。
+
+Give a player access to a sub-area between two positions that have already been protected, Use set_owner if you don't want the parent to be set.=授予其他玩家已有保護區內一部分地方、兩個座標之間區域的的存取權。如果不想上級保護區被設定，請使用 /set_owner。
+
+Invalid regular expression.=正則表達式無效。
+Limit: @1 areas=限制：@1個保護區
+Limit: no area count limit=限制：無數量限制
+List your areas, or all areas if you are an admin.=列出您擁有的保護區，或對於管理員而言，列出所有保護區。
+Move (or resize) an area to the current positions.=移動一保護區至目前座標，或改變其大小。
+No matches found.=找不到匹配項。
+No visible areas.=沒有保護區可供查閱。
+Owner changed.=擁有者已修改。
+Players with the "@1" privilege can protect up to @2 areas=擁有「@1」權限的玩家最多可以保護 @2 個保護區
+
+Protect an area between two positions and give a player access to it without setting the parent of the area to any existing area=授予其他玩家兩個座標之間區域的控制權，而不設定上級保護區
+
+Protect your own area=對您自己的地區施加保護
+Recursively remove areas using an ID=通過保護區編號移除保護區以及其所有子保護區
+Remove an area using an ID=通過保護區編號移除一保護區
+Removed area @1=保護區 @1 已移除
+Removed area @1 and its sub areas.=保護區 @1 以及其所有子保護區已移除
+Removes all ownerless areas=移除所有無主保護區
+Rename an area that you own=重新命名您擁有的保護區
+Self protection is disabled.=自我保護被禁用。
+Self protection is enabled.=自我保護被啓用。
+That area doesn't exist.=保護區不存在。
+The player "@1" does not exist.=玩家「@1」不存在。
+Toggle an area open (anyone can interact) or closed=切換保護區開放狀態（如開放，所有玩家均可互動）
+Toggle an area open/closed for members in your faction.=切換保護區對派系成員的開放狀態
+You are an area administrator ("areas" privilege).=您是保護區管理員（擁有「area」權限）
+You can protect areas=您可以建立保護區
+You can't protect that area.=您無法保護該區域。
+You can't protect that area: @1=您無法保護該區域：@1
+You don't have the necessary privilege ("@1").=您沒有所需權限（「@1」）
+You don't own that area.=您並不擁有改保護區。
+You have @1 areas.=您有 @1 個保護區。
+
+You have been granted control over area #@1. Type /list_areas to show your areas.=您已被授予保護區 #@1 的控制權。使用 /list_areas 以查看您的保護區。
+
+You have extended area protection limits ("areas_high_limit" privilege).=您擁有延伸保護權限（擁有「areas_high_limit」權限）
+
+You have the necessary privilege ("@1").=您擁有所需權限（「@1」）
+You need to select an area first.=請先選擇範圍。
+
+### chatcommands.lua ###
+### pos.lua ###
+
+<ID>=<保護區編號>
+Invalid usage, see /help @1.=無效用法，請參見 /help @1。
+
+### hud.lua ###
+
+:open=:開放
+Areas:=保護區：
+
+### init.lua ###
+
+Can administer areas.=可以管理保護區
+Can protect areas.=可以進行保護
+Can protect more, bigger areas.=進行保護時，數量以及體積上限提高。
+
+### interact.lua ###
+
+@1 is protected by @2.=@1 被 @2 保護。
+
+### internal.lua ###
+
+Area is too big.=區域過大。
+
+Self protection is disabled or you do not have the necessary privilege.=自我保護被禁用，或您沒有所需權限。
+
+The area intersects with @1 [@2] (@3).=區域與 @1 [@2] (@3) 重疊。
+
+You have reached the maximum amount of areas that you are allowed to protect.=您的現有保護區數量已達到所允許的上限。
+
+
+### legacy.lua ###
+
+<version>=<版本>
+Converted areas saved. Done.=轉換後的保護區已經保存。完成。
+Converting areas…=正在轉換保護區……
+Error loading legacy file: @1=載入舊檔案時發生錯誤：@1
+Invalid version number. (0 allowed)=無效版本號。（允許值：0）
+Legacy file loaded.=舊檔案已載入。
+
+Loads, converts, and saves the areas from a legacy save file.=載入、轉換並儲存舊存檔中的保護區。
+
+Table format updated.=表格格式已更新。
+unnamed=未命名
+
+### pos.lua ###
+
+<not set>=<未設定>
+Area @1 selected.=保護區 @1 已選擇。
+Area position @1 set to @2=保護區座標 @1 已設定爲 @2。
+Position @1 set to @2=保護區座標 @1 已設定爲 @2。
+Position @1: =保護區座標 @1：
+Select an area by ID.=通過保護區編號選擇區域
+Select position @1 by punching a node.=請擊打方塊，以設定保護區座標 @1 的位置。
+Select positions by punching two nodes.=請擊打兩個方塊，以設定保護區座標的位置。
+
+Set area protection region position @1 to your location or the one specified=將保護區座標 @1 的位置設定爲您目前的位置或提供的座標
+
+Set area protection region, position 1, or position 2 by punching nodes, or display the region=擊打方塊設定保護區座標，或獲得其座標資訊
+
+The area @1 does not exist.=保護區 @1 不存在。
+Unable to get position.=無法獲得座標。
+Unknown subcommand: @1=子指令不明：@1
+
+Relative coordinates is not supported on this server. Please upgrade Minetest to 5.7.0 or newer versions.=此伺服器不支援相對座標。請更新Minetest至5.7.0或之後的版本。
diff --git a/locale/template.txt b/locale/template.txt
index 2026c5e..3508101 100644
--- a/locale/template.txt
+++ b/locale/template.txt
@@ -133,3 +133,5 @@ Set area protection region, position 1, or position 2 by punching nodes, or disp
 The area @1 does not exist.=
 Unable to get position.=
 Unknown subcommand: @1=
+
+Relative coordinates is not supported on this server. Please upgrade Minetest to 5.7.0 or newer versions.=
diff --git a/pos.lua b/pos.lua
index 7a9cbd2..f512eac 100644
--- a/pos.lua
+++ b/pos.lua
@@ -22,6 +22,37 @@ local function posLimit(pos)
 	}
 end
 
+local parse_relative_pos
+
+if minetest.parse_relative_number then
+	parse_relative_pos = function(x_str, y_str, z_str, pos)
+
+		local x = pos and minetest.parse_relative_number(x_str, pos.x)
+			or tonumber(x_str)
+		local y = pos and minetest.parse_relative_number(y_str, pos.y)
+			or tonumber(y_str)
+		local z = pos and minetest.parse_relative_number(z_str, pos.z)
+			or tonumber(z_str)
+		if x and y and z then
+			return vector.new(x, y, z)
+		end
+	end
+else
+	parse_relative_pos = function(x_str, y_str, z_str, pos)
+		local x = tonumber(x_str)
+		local y = tonumber(y_str)
+		local z = tonumber(z_str)
+		if x and y and z then
+			return vector.new(x, y, z)
+		elseif string.sub(x_str, 1, 1) == "~"
+			or string.sub(y_str, 1, 1) == "~"
+			or string.sub(z_str, 1, 1) == "~" then
+			return nil, S("Relative coordinates is not supported on this server. " ..
+				"Please upgrade Minetest to 5.7.0 or newer versions.")
+		end
+	end
+end
+
 minetest.register_chatcommand("select_area", {
 	params = S("<ID>"),
 	description = S("Select an area by ID."),
@@ -47,20 +78,25 @@ minetest.register_chatcommand("area_pos1", {
 	privs = {},
 	func = function(name, param)
 		local pos
-		local found, _, x, y, z = param:find(
-				"^(-?%d+)[, ](-?%d+)[, ](-?%d+)$")
+		local player = minetest.get_player_by_name(name)
+		if player then
+			pos = vector.round(player:get_pos())
+		end
+		local found, _, x_str, y_str, z_str = param:find(
+			"^(~?-?%d*)[, ](~?-?%d*)[, ](~?-?%d*)$")
 		if found then
-			pos = {x=tonumber(x), y=tonumber(y), z=tonumber(z)}
-		elseif param == "" then
-			local player = minetest.get_player_by_name(name)
-			if player then
-				pos = player:get_pos()
-			else
-				return false, S("Unable to get position.")
+			local get_pos, reason = parse_relative_pos(x_str, y_str, z_str, pos)
+			if get_pos then
+				pos = get_pos
+			elseif not get_pos and reason then
+				return false, reason
 			end
-		else
+		elseif param ~= "" then
 			return false, S("Invalid usage, see /help @1.", "area_pos1")
 		end
+		if not pos then
+			return false, S("Unable to get position.")
+		end
 		pos = posLimit(vector.round(pos))
 		areas:setPos1(name, pos)
 		return true, S("Area position @1 set to @2", "1",
@@ -74,20 +110,25 @@ minetest.register_chatcommand("area_pos2", {
 		.." location or the one specified", "2"),
 	func = function(name, param)
 		local pos
-		local found, _, x, y, z = param:find(
-				"^(-?%d+)[, ](-?%d+)[, ](-?%d+)$")
+		local player = minetest.get_player_by_name(name)
+		if player then
+			pos = vector.round(player:get_pos())
+		end
+		local found, _, x_str, y_str, z_str = param:find(
+			"^(~?-?%d*)[, ](~?-?%d*)[, ](~?-?%d*)$")
 		if found then
-			pos = {x=tonumber(x), y=tonumber(y), z=tonumber(z)}
-		elseif param == "" then
-			local player = minetest.get_player_by_name(name)
-			if player then
-				pos = player:get_pos()
-			else
-				return false, S("Unable to get position.")
+			local get_pos, reason = parse_relative_pos(x_str, y_str, z_str, pos)
+			if get_pos then
+				pos = get_pos
+			elseif not get_pos and reason then
+				return false, reason
 			end
-		else
+		elseif param ~= "" then
 			return false, S("Invalid usage, see /help @1.", "area_pos2")
 		end
+		if not pos then
+			return false, S("Unable to get position.")
+		end
 		pos = posLimit(vector.round(pos))
 		areas:setPos2(name, pos)
 		return true, S("Area position @1 set to @2", "2",