diff --git a/mods/ITEMS/REDSTONE/mesecons_commandblock/init.lua b/mods/ITEMS/REDSTONE/mesecons_commandblock/init.lua
index 3bc1b9ac..b7343c93 100644
--- a/mods/ITEMS/REDSTONE/mesecons_commandblock/init.lua
+++ b/mods/ITEMS/REDSTONE/mesecons_commandblock/init.lua
@@ -62,7 +62,7 @@ local function check_commands(commands, player_name)
 		local cmddef = minetest.chatcommands[cmd]
 		if not cmddef then
 			-- Invalid chat command
-			msg = "Error: The command “"..cmd.."” does not exist; your command block has not been changed. Use the “help” chat command for a list of available commands."
+			local msg = "Error: The command “"..cmd.."” does not exist; your command block has not been changed. Use the “help” chat command for a list of available commands."
 			if string.sub(cmd, 1, 1) == "/" then
 				msg = msg .. " Hint: Try to remove the trailing slash."
 			end
diff --git a/mods/ITEMS/REDSTONE/mesecons_mvps/init.lua b/mods/ITEMS/REDSTONE/mesecons_mvps/init.lua
index 3ef39b74..40d713eb 100644
--- a/mods/ITEMS/REDSTONE/mesecons_mvps/init.lua
+++ b/mods/ITEMS/REDSTONE/mesecons_mvps/init.lua
@@ -241,7 +241,7 @@ function mesecon.mvps_push_or_pull(pos, stackdir, movedir, maximum, all_pull_sti
 		if first_dropper and id >= first_dropper then
 			break
 		end
-		np = vector.add(n.pos, movedir)
+		local np = vector.add(n.pos, movedir)
 		minetest.add_node(np, n.node)
 		minetest.get_meta(np):from_table(n.meta)
 	end
diff --git a/mods/ITEMS/REDSTONE/mesecons_pistons/init.lua b/mods/ITEMS/REDSTONE/mesecons_pistons/init.lua
index 7ca1cea5..e5b6045b 100644
--- a/mods/ITEMS/REDSTONE/mesecons_pistons/init.lua
+++ b/mods/ITEMS/REDSTONE/mesecons_pistons/init.lua
@@ -1,7 +1,7 @@
 local PISTON_MAXIMUM_PUSH = 12
 
 -- Get mesecon rules of pistons
-piston_rules =
+local piston_rules =
 {{x=0,  y=0,  z=1}, --everything apart from z- (pusher side)
  {x=1,  y=0,  z=0},
  {x=-1, y=0,  z=0},
@@ -30,7 +30,7 @@ local piston_get_rules = function (node)
 	return rules
 end
 
-piston_facedir_direction = function (node)
+local piston_facedir_direction = function (node)
 	local rules = {{x = 0, y = 0, z = -1}}
 	for i = 1, node.param2 do
 		rules = mesecon.rotate_rules_left(rules)
@@ -38,7 +38,7 @@ piston_facedir_direction = function (node)
 	return rules[1]
 end
 
-piston_get_direction = function (dir, node)
+local piston_get_direction = function (dir, node)
 	if type(dir) == "function" then
 		return dir(node)
 	else
@@ -830,7 +830,7 @@ local piston_up_down_get_stopper = function (node, dir, stack, stackid)
 end
 
 local piston_get_stopper = function (node, dir, stack, stackid)
-	pistonspec = minetest.registered_nodes[node.name].mesecons_piston
+	local pistonspec = minetest.registered_nodes[node.name].mesecons_piston
 	dir = piston_get_direction(pistonspec.dir, node)
 	local pusherpos  = vector.add(stack[stackid].pos, dir)
 	local pushernode = minetest.get_node(pusherpos)
diff --git a/mods/ITEMS/mcl_banners/patterncraft.lua b/mods/ITEMS/mcl_banners/patterncraft.lua
index 9c4339b0..ef667d65 100644
--- a/mods/ITEMS/mcl_banners/patterncraft.lua
+++ b/mods/ITEMS/mcl_banners/patterncraft.lua
@@ -339,7 +339,7 @@ local banner_pattern_craft = function(itemstack, player, old_craft_grid, craft_i
 
 		-- For copying to be allowed, one banner has to have no layers while the other one has at least 1 layer.
 		-- The banner with layers will be used as a source.
-		local src_banner, src_layers, src_desc, src_index
+		local src_banner, src_layers_raw, src_desc, src_index
 		if #b1layers == 0 and #b2layers > 0 then
 			src_banner = banner2
 			src_layers_raw = b2layers_raw
diff --git a/mods/ITEMS/mcl_core/functions.lua b/mods/ITEMS/mcl_core/functions.lua
index 42d7c899..d8eea101 100644
--- a/mods/ITEMS/mcl_core/functions.lua
+++ b/mods/ITEMS/mcl_core/functions.lua
@@ -270,7 +270,7 @@ end
 function mcl_core.generate_v6_oak_tree(pos)
 	local trunk = "mcl_core:tree"
 	local leaves = "mcl_core:leaves"
-	node = {name = ""}
+	local node = {name = ""}
 	for dy=1,4 do
 		pos.y = pos.y+dy
 		if minetest.get_node(pos).name ~= "air" then
diff --git a/mods/ITEMS/mcl_fire/init.lua b/mods/ITEMS/mcl_fire/init.lua
index 19bbd094..2a7a8119 100644
--- a/mods/ITEMS/mcl_fire/init.lua
+++ b/mods/ITEMS/mcl_fire/init.lua
@@ -345,7 +345,7 @@ if not fire_enabled then
 		chance = 2,
 		catch_up = false,
 		action = function(pos)
-			function try_ignite(airs)
+			local function try_ignite(airs)
 				while #airs > 0 do
 					local r = math.random(1, #airs)
 					if minetest.find_node_near(airs[r], 1, {"group:flammable", "group:flammable_lava"}) then
diff --git a/mods/ITEMS/mcl_portals/portal_end.lua b/mods/ITEMS/mcl_portals/portal_end.lua
index 3c20345e..b005a240 100644
--- a/mods/ITEMS/mcl_portals/portal_end.lua
+++ b/mods/ITEMS/mcl_portals/portal_end.lua
@@ -140,6 +140,7 @@ local function check_end_portal_frame(pos)
 				end
 			end
 			-- All checks survived! We have a valid portal!
+			local k
 			if dir.x > 0 then
 				k = 1
 			else
@@ -158,6 +159,7 @@ local function check_end_portal_frame(pos)
 					return false
 				end
 			end
+			local k
 			if dir.z > 0 then
 				k = 1
 			else
diff --git a/mods/ITEMS/mcl_tools/init.lua b/mods/ITEMS/mcl_tools/init.lua
index 745ddbea..974d9663 100644
--- a/mods/ITEMS/mcl_tools/init.lua
+++ b/mods/ITEMS/mcl_tools/init.lua
@@ -16,7 +16,7 @@
 -- TODO: Add legacy support for Minetest Game groups like crumbly, snappy, cracky, etc. for all tools
 
 -- The hand
-local groupcaps, range
+local groupcaps, hand_range
 if minetest.settings:get_bool("creative_mode") then
 	-- Instant breaking in creative mode
 	groupcaps = {
diff --git a/mods/MAPGEN/mcl_mapgen_core/init.lua b/mods/MAPGEN/mcl_mapgen_core/init.lua
index 012c43fa..e7500b7b 100644
--- a/mods/MAPGEN/mcl_mapgen_core/init.lua
+++ b/mods/MAPGEN/mcl_mapgen_core/init.lua
@@ -1558,7 +1558,7 @@ local generate_underground_mushrooms = function(minp, maxp, seed)
 end
 
 local pr_nether = PseudoRandom(os.time()+667)
-local nehter_wart_chance
+local nether_wart_chance
 if mg_name == "v6" then
 	nether_wart_chance = 85
 else
diff --git a/mods/PLAYER/mcl_sprint/init.lua b/mods/PLAYER/mcl_sprint/init.lua
index 8208e230..79ee234c 100644
--- a/mods/PLAYER/mcl_sprint/init.lua
+++ b/mods/PLAYER/mcl_sprint/init.lua
@@ -39,6 +39,23 @@ minetest.register_on_leaveplayer(function(player)
 	local playerName = player:get_player_name()
 	players[playerName] = nil
 end)
+
+local function setSprinting(playerName, sprinting) --Sets the state of a player (0=stopped/moving, 1=sprinting)
+	local player = minetest.get_player_by_name(playerName)
+	if players[playerName] then
+		players[playerName]["sprinting"] = sprinting
+		-- Don't overwrite physics when standing on soul sand or sleeping
+		if mcl_playerinfo[playerName].node_stand ~= "mcl_nether:soul_sand" and player:get_attribute("mcl_beds:sleeping") ~= "true" then
+			if sprinting == true then
+				player:set_physics_override({speed=mcl_sprint.SPEED})
+			elseif sprinting == false then
+				player:set_physics_override({speed=1.0})
+			end
+			return true
+		end
+	end
+	return false
+end
 minetest.register_globalstep(function(dtime)
 	--Get the gametime
 	local gameTime = minetest.get_gametime()
@@ -106,20 +123,3 @@ minetest.register_globalstep(function(dtime)
 		end
 	end
 end)
-
-function setSprinting(playerName, sprinting) --Sets the state of a player (0=stopped/moving, 1=sprinting)
-	local player = minetest.get_player_by_name(playerName)
-	if players[playerName] then
-		players[playerName]["sprinting"] = sprinting
-		-- Don't overwrite physics when standing on soul sand or sleeping
-		if mcl_playerinfo[playerName].node_stand ~= "mcl_nether:soul_sand" and player:get_attribute("mcl_beds:sleeping") ~= "true" then
-			if sprinting == true then
-				player:set_physics_override({speed=mcl_sprint.SPEED})
-			elseif sprinting == false then
-				player:set_physics_override({speed=1.0})
-			end
-			return true
-		end
-	end
-	return false
-end