backguard compatibility for translation checks

*  this made compatible the mod with MT 0.4 and MT 5.X

init.lua

@@ -21,7 +21,28 @@
 
 
 -- Load support for MT game translation.
-local S = core.get_translator(core.get_current_modname())
+-- Check for translation method
+local S
+if minetest.get_translator ~= nil then
+	S = minetest.get_translator(core.get_current_modname()) -- 5.x translation function
+else
+	if minetest.get_modpath("intllib") then
+		dofile(minetest.get_modpath("intllib") .. "/init.lua")
+		if intllib.make_gettext_pair then
+			gettext, ngettext = intllib.make_gettext_pair() -- new gettext method
+		else
+			gettext = intllib.Getter() -- old text file method
+		end
+		S = gettext
+	else -- boilerplate function
+		S = function(str, ...)
+			local args = {...}
+			return str:gsub("@%d+", function(match)
+				return args[tonumber(match:sub(2))]
+			end)
+		end
+	end
+end
 
 local kill_hitter = core.settings:get_bool("pvpinvul_kill_hitter")