Add support for MT 5 game translation (rebasing ) (#2466)

rebased #2368

mods/carts/cart_entity.lua

@@ -1,3 +1,8 @@
+-- carts/cart_entity.lua
+
+-- support for MT game translation.
+local S = carts.get_translator
+
 local cart_entity = {
 	initial_properties = {
 		physical = false, -- otherwise going uphill breaks
@@ -383,7 +388,7 @@ end
 minetest.register_entity("carts:cart", cart_entity)
 
 minetest.register_craftitem("carts:cart", {
-	description = "Cart (Sneak+Click to pick up)",
+	description = S("Cart (Sneak+Click to pick up)"),
 	inventory_image = minetest.inventorycube("carts_cart_top.png", "carts_cart_side.png", "carts_cart_side.png"),
 	wield_image = "carts_cart_side.png",
 	on_place = function(itemstack, placer, pointed_thing)

mods/carts/init.lua

@@ -1,7 +1,12 @@
+-- carts/init.lua
+
+-- Load support for MT game translation.
+local S = minetest.get_translator("carts")
 
 carts = {}
 carts.modpath = minetest.get_modpath("carts")
 carts.railparams = {}
+carts.get_translator = S
 
 -- Maximal speed of the cart in m/s (min = -1)
 carts.speed_max = 7

mods/carts/rails.lua

@@ -1,5 +1,10 @@
+-- carts/rails.lua
+
+-- support for MT game translation.
+local S = carts.get_translator
+
 carts:register_rail("carts:rail", {
-	description = "Rail",
+	description = S("Rail"),
 	tiles = {
 		"carts_rail_straight.png", "carts_rail_curved.png",
 		"carts_rail_t_junction.png", "carts_rail_crossing.png"
@@ -22,7 +27,7 @@ minetest.register_alias("default:rail", "carts:rail")
 
 
 carts:register_rail("carts:powerrail", {
-	description = "Powered Rail",
+	description = S("Powered Rail"),
 	tiles = {
 		"carts_rail_straight_pwr.png", "carts_rail_curved_pwr.png",
 		"carts_rail_t_junction_pwr.png", "carts_rail_crossing_pwr.png"
@@ -41,7 +46,7 @@ minetest.register_craft({
 
 
 carts:register_rail("carts:brakerail", {
-	description = "Brake Rail",
+	description = S("Brake Rail"),
 	tiles = {
 		"carts_rail_straight_brk.png", "carts_rail_curved_brk.png",
 		"carts_rail_t_junction_brk.png", "carts_rail_crossing_brk.png"