Improved and translatable client version check

mods/nc_api/init.lua

@@ -75,7 +75,6 @@ end
 
 for k, v in pairs(minetest) do nodecore[k .. "_raw"] = v end
 
-include("compat_clientversion")
 include("compat_creative")
 include("compat_issue10127")
 include("compat_legacyent")
@@ -133,3 +132,4 @@ include("item_groupdump")
 include("item_tiledump")
 
 include("setup_serverversion")
+include("setup_clientversion")

mods/nc_api/setup_clientversion.lua

@@ -1,6 +1,8 @@
 -- LUALOCALS < ---------------------------------------------------------
-local minetest
-    = minetest
+local minetest, nodecore, string
+    = minetest, nodecore, string
+local string_format
+    = string.format
 -- LUALOCALS > ---------------------------------------------------------
 
 local minproto = 41
@@ -8,17 +10,23 @@ local minrelease = "5.6"
 
 local rejected = {}
 
+local kickmsg = string_format("\n\n%s\n%s",
+	nodecore.translate("Your Minetest version is outdated, please update!"),
+	nodecore.translate("Version @1 or higher is required.", minrelease))
+
+local announce = "@1 rejected. (protocol version @2)"
+nodecore.translate_inform(announce)
+
 minetest.register_on_joinplayer(function(player)
 		local pname = player:get_player_name()
 		local pinfo = minetest.get_player_information(pname)
 		if (not pinfo) or (pinfo.protocol_version < minproto) then
 			rejected[pname] = true
-			minetest.kick_player(pname, "Outdated client, "
-				.. minrelease .. " required")
+			minetest.kick_player(pname, kickmsg)
 			return minetest.after(0, function()
-					return minetest.chat_send_all("*** " .. pname
-						.. " rejected. (protocol version "
-						.. (pinfo and pinfo.protocol_version or "unknown") .. ")")
+					return minetest.chat_send_all("*** "
+						.. nodecore.translate(announce, pname,
+							pinfo and pinfo.protocol_version or "unknown"))
 				end)
 		else
 			rejected[pname] = nil