TextBox Release Focus and submiting?

I wanna make a script that in a textbox detects a string then will replace it with something else then immediately submit it afterwords, in other words as in submit like if you are chatting then you press enter it submits the chat. I know I could use the chat RemoteEvent but I want to use this on all gui's not just chat.

local blacklist = {
	'badword',
	'badword2',
	}



local RunService = game:GetService("RunService")
local plr = game.Players.LocalPlayer
local pgui = plr.PlayerGui

RunService.RenderStepped:Connect(function()
	for i,v in pairs(pgui:GetDescendants()) do
		if v.ClassName == 'TextBox' or v.ClassName == 'TextLabel' or v.ClassName == 'TextButton' then
			for b,n in pairs(blacklist) do
				if string.find(v.Text,n) then
					v.Text = "#&*^(@"
					-- Not sure what to put here
				end
			end
		end
	end
end)

So, to replace something in a string with something else you do

local NewString = string.gsub("String Here", "Bad String Here", function(String)
	return string.rep("Replacement Character Here", #String)
end)

Basically what the above code does is:

• Search for the Bad String
• Replace it with the Third parameter which is in this case a function
• The function repeats the Replacement Character String Length amount of times

If you are filtering chat you should use TextService:FilterStringAsync()