Customize Player's Name Through TextBox?

Not like their "name", but what they want to put on like a jersey or something. I'll show you the script, it kinda follows PeasFactory's script.

(ChangeJersey Gui Script)

local button = script.Parent
local buttontext = button.Text
local player = game.Players.LocalPlayer
local char = player.Character or player.CharacterAdded:wait()
local humanoid = char:WaitForChild('Humanoid')
local torso = char:WaitForChild('Torso')
local torsogui = torso:WaitForChild('Jersey')
local guitext = torsogui:WaitForChild('TextLabel')


button.Changed:connect(function()
	if buttontext then
		guitext.Text = buttontext
	end
end)

button.FocusLost:connect(function(enterPressed) --tried using this method whenever they pressed enter, but idk if it really matters
	if enterPressed then
		if buttontext == '[name here]' then
			buttontext = player.Name
		end
	else
		buttontext = guitext.Text
	end
end)

(StarterGui Jersey)

wait(5)
local plr=game.Players.LocalPlayer
local surf=Instance.new('SurfaceGui',plr.Character:WaitForChild'Torso')
surf.Adornee=plr.Character.Torso
surf.Face='Back'
surf.CanvasSize=Vector2.new(100,100)
surf.Name = 'Jersey'
local txt=Instance.new("TextLabel",surf)
txt.BackgroundTransparency=1
txt.TextStrokeTransparency=0
txt.TextColor3=Color3.new(1,1,1)
txt.Text=plr.Name
txt.Size=UDim2.new(1,0,0.5,0)
txt.Position=UDim2.new(0,0,0,0)
txt.FontSize=Enum.FontSize.Size12
txt.TextScaled=false
txt.TextWrapped=true

If you could also help me implement a Filtering Text thingy, that would be wonderful. (:

StarterGUI

In-Game

Video

(Just want it so that whenever they change the text, it will be equivalent to the text on their back.)

Thank you guys for all the help, my game wouldn't be successful without you guys today.

-LukeGabrieI aka EnergyBrickz

You should have a TextBox for receiving the actual name and then use a remoteevent to fire the server with the text in the TextBox, from there you must filter it to comply with roblox, then can set the TextLabel's text in the SurfaceGui on the player to replicated the name to what all players can see