Why Is Part Of My Script Not Working?

I have a Custom Chat GUI but the banned words do not work and I have no idea why below is be script and everything else works fine but the part that stops players saying banned words does not work, why is this?

MAIN SCRIPT:

ChatColors = {"Bright blue","Bright red","Bright green","Bright yellow","Bright orange","Bright violet","White","Black","Pink","Brown"}
BannedWords = {"RUDEWORD"} -- Words players cannot use in the chat.
CustomColor = 159775970 -- The ID of the item needed to change their own custom chat color.
OPrefix = "[OWNER]" -- Prefix used before an owner's name then message.
Owners = {"OWNER","OWNER","OWNER"} -- Players who have the owner prefix.
APrefix = "[ADMIN]" -- Prefix used before an admin's name then message.
Admins = {"ADMIN","ADMIN","ADMIN"} -- Players who have the admin prefix.

game.Players.PlayerAdded:connect(function(player)
	local SV = Instance.new("StringValue")
	SV.Name = "SetColor"
	SV.Value = ChatColors[math.random(1,#ChatColors)]
	player.Chatted:connect(function(message)
		if string.sub(message:lower(),1,3) == "/c "  then
			if game:GetService("MarketplaceService"):PlayerOwnsAsset(player,CustomColor) then
				SV.Value = string.sub(message,4)
			end
		end
		for i,a in pairs(game.Players:GetChildren()) do
			b = a:FindFirstChild("PlayerGui"):FindFirstChild("CustomChat")
			for i,c in pairs(b.ChatBox:GetChildren()) do
				if c:IsA("TextLabel") then
					c.Position = c.Position - UDim2.new(0,0,0.2,0)
					if c.AbsolutePosition.Y <= 0 then
						c:Destroy()
					end
				end
			end
			local d = game.ReplicatedStorage.Chat:Clone()
			d.Parent = b.ChatBox
			for i,v in pairs(BannedWords) do
				if message:lower():find(v) then
					d.Text = ""..player.Name.." tried to say a banned word!" break
				end
			end
			if d.Text ~= ""..player.Name.." tried to say a banned word!" then
				for i,x in pairs(Owners) do
					if player.Name:lower():find(x:lower()) then
						d.Text = ""..OPrefix.." "..player.Name..": "..message
					else
						for i,y in pairs(Admins) do
							if player.Name:lower():find(y:lower()) then
								d.Text = ""..APrefix.." "..player.Name..": "..message
							end
						end
					end
				end
				if d.Text ~= ""..OPrefix.." "..player.Name..": "..message and d.Text ~= ""..APrefix.." "..player.Name..": "..message then
					d.Text = ""..player.Name..": "..message
				end
			end
			d.TextColor3 = BrickColor.new(SV.Value).Color
			game.Debris:AddItem(d,30)
		end
	end)
end)

BROKEN PART:

for i,v in pairs(BannedWords) do
	if message:lower():find(v) then
		d.Text = ""..player.Name.." tried to say a banned word!" break
	end
end