diff --git a/command.lua b/command.lua
index fb93ad1..795b396 100644
--- a/command.lua
+++ b/command.lua
@@ -1,9 +1,4 @@
-local S
-if minetest.get_translator then
-	S = minetest.get_translator("calendar")
-else
-	S = function(s) return s end
-end
+local S = calendar._get_translator("calendar")
 
 minetest.register_chatcommand("calendar", {
 	param = "",
diff --git a/gui.lua b/gui.lua
index f506d25..26c08b1 100644
--- a/gui.lua
+++ b/gui.lua
@@ -1,9 +1,4 @@
-local S
-if minetest.get_translator then
-	S = minetest.get_translator("calendar")
-else
-	S = function(s) return s end
-end
+local S = calendar._get_translator("calendar")
 local F = minetest.formspec_escape
 
 local COLOR_HOLIDAY = "#00FF00"
@@ -22,6 +17,8 @@ local DEFAULT_SETTINGS = {
 	show_controls = true,
 }
 
+local SHOW_AREA_TOOLTIPS = minetest.features.formspec_version_element
+
 function calendar.show_calendar(player_name, settings, wanted_months, wanted_years, caption_format)
 	if not settings then
 		settings = DEFAULT_SETTINGS
@@ -55,11 +52,7 @@ function calendar.show_calendar(player_name, settings, wanted_months, wanted_yea
 				table.insert(args, calendar.get_date_string(caption_format[a], tdays))
 			end
 		end
-		if minetest.translate then
-			caption = minetest.translate(caption_format[2], caption_format[1], unpack(args))
-		else
-			caption = S(caption_format[2], unpack(args))
-		end
+		caption = calendar._translate(caption_format[2], caption_format[1], unpack(args))
 	else
 		if settings.ordinal then
 			caption = S("Month @1, year @2", wanted_dmonths, wanted_dyears)
@@ -101,8 +94,10 @@ function calendar.show_calendar(player_name, settings, wanted_months, wanted_yea
 		local holidays = calendar.get_holidays(tdays)
 		local tooltip_lines = {}
 		if settings.show_holidays and #holidays > 0 then
-			for h=1, #holidays do
-				table.insert(tooltip_lines, minetest.colorize(COLOR_HOLIDAY, holidays[h].name))
+			if SHOW_AREA_TOOLTIPS then
+				for h=1, #holidays do
+					table.insert(tooltip_lines, minetest.colorize(COLOR_HOLIDAY, holidays[h].name))
+				end
 			end
 			day_str = minetest.colorize(COLOR_HOLIDAY, day_str)
 			box_color = COLOR_DAYBOX_HOLIDAY
@@ -110,7 +105,9 @@ function calendar.show_calendar(player_name, settings, wanted_months, wanted_yea
 		day_str = F(day_str)
 		if settings.show_today and tdays == total_days then
 			formspec = formspec .. "box["..(x-0.05)..","..(y-0.05)..";1.1,1.1;"..COLOR_DAYBOX_TODAY.."]"
-			table.insert(tooltip_lines, minetest.colorize(COLOR_TOOLTIP_TODAY, S("Today")))
+			if SHOW_AREA_TOOLTIPS then
+				table.insert(tooltip_lines, minetest.colorize(COLOR_TOOLTIP_TODAY, S("Today")))
+			end
 		end
 		formspec = formspec .. "box["..x..","..y..";1,1;"..box_color.."]" ..
 		"label["..(x+0.15)..","..(y+0.3)..";"..day_str.."]"
@@ -128,18 +125,21 @@ function calendar.show_calendar(player_name, settings, wanted_months, wanted_yea
 		if wanted_months > 0 or wanted_years > 0 then
 			formspec = formspec .. "button[0.5,"..y..";1,1;prev_year;<<]"
 			.. "button[1.5,"..y..";1,1;prev_month;<]"
-			.. "tooltip[prev_month;"..F(S("Previous month")).."]"
+			formspec = formspec .. "tooltip[prev_month;"..F(S("Previous month")).."]"
 			.. "tooltip[prev_year;"..F(S("Previous year")).."]"
 		end
 		formspec = formspec .. "button[2.5,"..y..";2,1;today;"..F(S("Today")).."]"
 		formspec = formspec .. "button[4.5,"..y..";1,1;next_month;>]"
 		.. "button[5.5,"..y..";1,1;next_year;>>]"
-		.. "tooltip[next_month;"..F(S("Next month")).."]"
+		formspec = formspec .. "tooltip[next_month;"..F(S("Next month")).."]"
 		.. "tooltip[next_year;"..F(S("Next year")).."]"
 	end
 	local size_x = math.max(calendar.WEEK_DAYS+2, 7)
 	local size_y = y+1.5
-	formspec = "formspec_version[3]size["..size_x..","..size_y.."]" .. formspec
+	if minetest.features.formspec_version_element then
+		formspec = "formspec_version[3]" .. formspec
+	end
+	formspec = "size["..size_x..","..size_y.."]" .. formspec
 	minetest.show_formspec(player_name, "calendar:calendar", formspec)
 
 	player_current_calendars[player_name] = { years = wanted_years, months = wanted_months }
diff --git a/init.lua b/init.lua
index f613d20..4bdd85b 100644
--- a/init.lua
+++ b/init.lua
@@ -1,10 +1,35 @@
 calendar = {}
-local S
-if minetest.get_translator then
-	S = minetest.get_translator("calendar")
+
+-- Compability translator code to support MT 0.4, which doesn't support
+-- translations for mods.
+-- This adds two dummy or wrapper functions:
+-- * minetest.translate ← calendar._translate
+-- * minetest.get_translator ← calendar._get_translator
+
+if not minetest.translate then
+	-- No translation system available, use dummy functions
+	function calendar._translate(textdomain, str, ...)
+		local arg = {n=select('#', ...), ...}
+		return str:gsub("@(.)", function(matched)
+			local c = string.byte(matched)
+			if string.byte("1") <= c and c <= string.byte("9") then
+				return arg[c - string.byte("0")]
+			else
+				return matched
+			end
+		end)
+	end
+
+	function calendar._get_translator(textdomain)
+		return function(str, ...) return calendar._translate(textdomain or "", str, ...) end
+	end
 else
-	S = function(s) return s end
+	-- Translation system available, just user wrapper functions
+	calendar._translate = minetest.translate
+	calendar._get_translator = minetest.get_translator
 end
+
+local S = calendar._get_translator("calendar")
 local F = minetest.formspec_escape
 
 dofile(minetest.get_modpath("calendar").."/gameconfig.lua")
diff --git a/node.lua b/node.lua
index ed2a50c..faeb4d6 100644
--- a/node.lua
+++ b/node.lua
@@ -1,9 +1,4 @@
-local S
-if minetest.get_translator then
-	S = minetest.get_translator("calendar")
-else
-	S = function(s) return s end
-end
+local S = calendar._get_translator("calendar")
 
 minetest.register_node("calendar:calendar", {
 	drawtype = "signlike",