add translation infrastructure

and add languages:
- Catalan
- German (CH)
- English (not sure this works yet)
- Spanish

.luacheckrc

@@ -1,5 +1,6 @@
 globals = {
 	"areas",
+	"hangglider",
 }
 
 read_globals = {

crafts.lua

@@ -1,4 +1,6 @@
 
+local S = hangglider.translator
+
 local has_unifieddyes = minetest.get_modpath("unifieddyes")
 
 local dye_colors = {
@@ -19,6 +21,24 @@ local dye_colors = {
 	pink       = "ff7f9f",
 }
 
+local translated_colors = {
+	white      = S("white"),
+	grey       = S("grey"),
+	dark_grey  = S("dark_grey"),
+	black      = S("black"),
+	violet     = S("violet"),
+	blue       = S("blue"),
+	cyan       = S("cyan"),
+	dark_green = S("dark_green"),
+	green      = S("green"),
+	yellow     = S("yellow"),
+	brown      = S("brown"),
+	orange     = S("orange"),
+	red        = S("red"),
+	magenta    = S("magenta"),
+	pink       = S("pink"),
+}
+
 local function get_dye_color(name)
 	local color
 	if has_unifieddyes then
@@ -35,15 +55,13 @@ end
 
 local function get_color_name(name)
 	name = string.gsub(name, "^dye:", "")
-	name = string.gsub(name, "_", " ")
-	name = string.gsub(name, "(%l)(%w*)", function(a, b) return string.upper(a)..b end)
-	return name
+	return translated_colors[name]
 end
 
 local function get_color_name_from_color(color)
 	for name, color_hex in pairs(dye_colors) do
 		if color == color_hex then
-			return name
+			return translated_colors[name]
 		end
 	end
 end
@@ -51,7 +69,7 @@ end
 -- This recipe is just a placeholder
 do
 	local item = ItemStack("hangglider:hangglider")
-	item:get_meta():set_string("description", "Colored Glider")
+	item:get_meta():set_string("description", S("Colored Glider"))
 	minetest.register_craft({
 		output = item:to_string(),
 		recipe = {"hangglider:hangglider", "group:dye"},
@@ -85,7 +103,7 @@ minetest.register_on_craft(function(crafted_item, _, old_craft_grid)
 			return ItemStack({name = "hangglider:hangglider", wear = wear})
 		end
 		local meta = crafted_item:get_meta()
-		meta:set_string("description", color_name.." Glider")
+		meta:set_string("description", S("@1 Glider", color_name))
 		meta:set_string("inventory_image", "hangglider_item.png^(hangglider_color.png^[multiply:#"..color..")")
 		meta:set_string("hangglider_color", color)
 		crafted_item:set_wear(wear)

init.lua

@@ -1,4 +1,9 @@
 
+hangglider = {
+	translator = minetest.get_translator('hangglider'),
+}
+local S = hangglider.translator
+
 local has_player_monoids = minetest.get_modpath("player_monoids")
 local has_areas = minetest.get_modpath("areas")
 
@@ -7,29 +12,31 @@ local enable_flak = has_areas and minetest.settings:get_bool("hangglider.enable_
 local flak_warning_time = tonumber(minetest.settings:get("hangglider.flak_warning_time")) or 2
 local hangglider_uses = tonumber(minetest.settings:get("hangglider.uses")) or 250
 
-local flak_warning = "You have entered restricted airspace!\n"..
-	"You will be shot down in "..flak_warning_time.." seconds by anti-aircraft guns!"
+local flak_warning = S("You have entered restricted airspace!@n"
+	.. "You will be shot down in @1 seconds by anti-aircraft guns!",
+	flak_warning_time)
 
 local hanggliding_players = {}
 local hud_overlay_ids = {}
 
 if enable_flak then
 	minetest.register_chatcommand("area_flak", {
-		params = "<ID>",
-		description = "Toggle airspace restrictions for area <ID>",
+		params = S("<ID>"),
+		description = S("Toggle airspace restrictions for area <ID>."),
 		func = function(name, param)
 			local id = tonumber(param)
 			if not id then
-				return false, "Invalid usage, see /help area_flak."
+				return false, S("Invalid usage, see /help area_flak.")
 			end
 			if not areas:isAreaOwner(id, name) then
-				return false, "Area "..id.." does not exist or is not owned by you."
+				return false, S("Area @1 does not exist or is not owned by you.", id)
 			end
 			local open = not areas.areas[id].flak
 			-- Save false as nil to avoid inflating the DB.
 			areas.areas[id].flak = open or nil
 			areas:save()
-			return true, "Area "..id.." airspace "..(open and "closed" or "opened")
+			return true, S("Area @1 airspace is @2.", id,
+				open and S("closed") or S("opened"))
 		end
 	})
 end
@@ -236,7 +243,7 @@ minetest.register_entity("hangglider:glider", {
 })
 
 minetest.register_tool("hangglider:hangglider", {
-	description = "Glider",
+	description = S("Glider"),
 	inventory_image = "hangglider_item.png",
 	sound = {breaks = "default_tool_breaks"},
 	on_use = hangglider_use,

locale/hangglider.ca.tr

@@ -0,0 +1,28 @@
+# textdomain: hangglider
+white=blanc
+grey=gris
+dark_grey=gris fosc
+black=negre
+violet=violeta
+blue=blau
+cyan=cian
+dark_green=verd fosc
+green=verd
+yellow=groc
+brown=marró
+orange=taronja
+red=vermell
+magenta=magenta
+pink=rosa
+Colored Glider=Planador de color
+@1 Glider=Planador @1
+You have entered restricted airspace!@@You will be shot down in @1 seconds by anti-aircraft guns!=Has entrat a l'espai aeri restringit!@@Seràs abatut en @1 segons per canons antiaeris!
+<ID>=
+Toggle airspace restrictions for area <ID>.=Activa o desactiva les restriccions d'espai aeri per a l'àrea <ID>.
+Invalid usage, see /help area_flak.=Ús no vàlid, consulta /help area_flak.
+Area @1 does not exist or is not owned by you.=L'àrea @1 no existeix o no és propietat teva.
+Area @1 airspace is @2.=L'àrea @1 espai aeri és @2.
+closed=tancat
+opened=obert
+Glider=Planador
+

locale/hangglider.de.tr

@@ -0,0 +1,28 @@
+# textdomain: hangglider
+white=Weisser
+grey=Grauer
+dark_grey=Dunkelgrauer
+black=Schwarzer
+violet=Violeter
+blue=Blauer
+cyan=Cyan farbener
+dark_green=Dunkelgrüner
+green=Grüner
+yellow=Gelber
+brown=Brauner
+orange=Orange farbener
+red=Roter
+magenta=Magenta farbener
+pink=Rosa
+Colored Glider=Farbiger Gleitschirm
+@1 Glider=@1 Gleitschirm
+You have entered restricted airspace!@@You will be shot down in @1 seconds by anti-aircraft guns!=Du bist in eingeschränktem Luftraum eingedrungen!@nDu wirst in @1 Sekunden von FLAK abgeschossen.
+<ID>=
+Toggle airspace restrictions for area <ID>.=Luftraumbeschränkungen für Gebiet <ID> umschalten.
+Invalid usage, see /help area_flak.=Ungültige Verwendung, siehe /help area_flak.=
+Area @1 does not exist or is not owned by you.=Gebiet @1 existiert nicht oder es gehört dir nicht.
+Area @1 airspace is @2.=Gebiet @1 Luftraum ist @2.
+closed=eingeschränkt
+opened=geöffnet
+Glider=Gleitschirm
+

locale/hangglider.en.tr

@@ -0,0 +1,28 @@
+# textdomain: hangglider
+white=White
+grey=Grey
+dark_grey=Dark Grey
+black=Black
+violet=Violet
+blue=Blue
+cyan=Cyan
+dark_green=Dark Green
+green=Green
+yellow=Yellow
+brown=Brown
+orange=Orange
+red=Red
+magenta=Magenta
+pink=Pink
+Colored Glider=
+@1 Glider=
+You have entered restricted airspace!@@You will be shot down in @1 seconds by anti-aircraft guns!=
+<ID>=
+Toggle airspace restrictions for area <ID>.=
+Invalid usage, see /help area_flak.=
+Area @1 does not exist or is not owned by you.=
+Area @1 airspace is @2.=
+closed=
+opened=
+Glider=
+

locale/hangglider.es.tr

@@ -0,0 +1,28 @@
+# textdomain: hangglider
+white=blanco
+grey=gris
+dark_grey=gris oscuro
+black=negro
+violet=violeta
+blue=azul
+cyan=cian
+dark_green=verde oscuro
+green=verde
+yellow=amarillo
+brown=marrón
+orange=naranja
+red=rojo
+magenta=magenta
+pink=rosa
+Colored Glider=Planeador Colorizado
+@1 Glider=Planeador @1
+You have entered restricted airspace!@@You will be shot down in @1 seconds by anti-aircraft guns!=¡Has entrado en espacio aéreo restringido!@n¡Serás derribado en @1 segundos por cañones antiaéreos!
+<ID>=
+Toggle airspace restrictions for area <ID>.=Alternar restricciones de espacio aéreo para el área <ID>.
+Invalid usage, see /help area_flak.=Uso no válido, consulta /help area_flak.
+Area @1 does not exist or is not owned by you.=El área @1 no existe o no es tuya.
+Area @1 airspace is @2.=Área @1 espacio aéreo está @2.
+closed=cerrado
+opened=abierto
+Glider=Planeador
+

locale/template.txt

@@ -0,0 +1,28 @@
+# textdomain: hangglider
+white=
+grey=
+dark_grey=
+black=
+violet=
+blue=
+cyan=
+dark_green=
+green=
+yellow=
+brown=
+orange=
+red=
+magenta=
+pink=
+Colored Glider=
+@1 Glider=
+You have entered restricted airspace!@@You will be shot down in @1 seconds by anti-aircraft guns!=
+<ID>=
+Toggle airspace restrictions for area <ID>.=
+Invalid usage, see /help area_flak.=
+Area @1 does not exist or is not owned by you.=
+Area @1 airspace is @2.=
+closed=
+opened=
+Glider=
+