Putting someone else's words on a shirt
The copyright question is the one everybody asks and it's rarely the one that bites. Trademark is, because ordinary English phrases are registered in the clothing category.

Someone said a thing, it stayed with you, and now you want to wear it. That's most of what a motto shirt has ever been.
The advice you'll find on whether you're allowed to is either a shrug or a lawyer's throat-clear, and both point at copyright. Copyright is usually not the thing that gets anybody in trouble.
Is a quote copyrighted?
Usually not, on its own. Short phrases and small groups of words generally fall outside copyright protection — the sentence is too short to be a protected work.
The exceptions are the ones you'd expect: a line lifted from a song lyric or a poem, where the quoted fragment is a meaningful chunk of a work that is protected, and anything long enough to carry the original's shape.
And the whole question disappears for anything old enough. The line in the picture above is Emerson, who died in 1882 — public domain everywhere, printable by anyone, no permission involved. A great deal of what people actually want to wear is in that category.
So what actually gets people in trouble?
Trademark, and it surprises people because it doesn't feel like intellectual property. It feels like English.
Trademarks are registered per category, and clothing is its own category — which means a short motivational phrase can be somebody's registered mark specifically for putting on shirts, while staying an ordinary sentence everywhere else.
This is not theoretical here. Producing one in-house drop, two of the phrases in the word list came back flagged and were swapped before anything was printed: IRON WILL → STILL STANDING, and NO LEASH → UNLEASHED. Neither of those is a reference to anything. They're the phrases anyone would land on writing a hard-edged shirt, which is exactly why they were taken.
Why is trademark the worse one?
Because there's no cheap way out of it, and the practical cost lands somewhere unexpected.
Copyright has a well-worn notice-and-takedown path — a claim arrives, the item comes down, everyone moves on. Trademark has no equivalent safe harbour, and the exposure isn't limited to the person who published the design.
The realistic consequence usually isn't a lawsuit either. It's an advertising account getting shut down, or a payment processor deciding your catalogue is a risk. That's a quieter, faster and much more annoying way to lose a shop than being sued.
What about a line from a film or a game?
Here the useful distinction is between the thing and the word.
An in-house batch ran into it directly: a wolverine is an animal, and drawing one is nobody's business but yours. WOLVERINE set as a wordmark across a chest is Marvel's, and the difference between those two shirts is entirely the lettering.
That generalises. Character names, catchphrases and title treatments are the trademarked surface — the creature, the era, the visual tradition usually aren't. It's the same line the style-not-the-property rule draws elsewhere, arriving from the typography side instead of the illustration side.
Does attribution help?
It changes what the shirt is. It doesn't create a licence.
Adding a name under a line doesn't convert an unlicensed use into a licensed one, and the common belief that credit makes it fine has no legal mechanism behind it. Where attribution genuinely does something is to the object itself: the shirt in the picture, with Ralph Waldo Emerson set small underneath, is a different garment from the same sentence floating alone. One is quoting. The other is claiming.
That's a design decision rather than a legal one, and it's worth making deliberately in both directions.
Will anything stop me?
Not while you're making it, and that's a deliberate choice rather than an oversight.
Text is not screened for trademarks at generation time here. The reasoning is written into the code that would have done it: pre-generation blocking over-blocks, because supreme and off-white are ordinary words before they are brands, and the legal risk actualises at print and sale, not at pixels.
So the review sits where the risk is. Publishing a design to the shop is explicit and human-reviewed — it enters a pending state, an automatic screen catches obvious hits, and only approved designs become publicly buyable. And publishing carries a warranty from you that you have the rights to what you're publishing, which is the part worth reading before you click it.
Making something for yourself and selling it to strangers are different acts, and only the second one is gated.
What's the version with no doubt in it?
Your own sentence, or a dead author's.
Public domain is genuinely large and genuinely free, and the fastest way into it is age — anything old enough that its author has been gone for a lifetime. That covers most of what gets quoted on walls and in speeches.
The other option is better anyway, and not for legal reasons. A famous line is a line anyone can buy, which makes it the opposite of the thing that makes a shirt worth wearing: a line that could sit on somebody else's chest without losing anything. A sentence you wrote about your own thing isn't quoting anyone, and nobody else can buy the same one.
How do I get one made?
Give the line at JustOG — the exact words, and who it's for — and the directions come back as a set. Pick one, drag the crop frame, see it composited on the real garment, and it's made to order and shipped.
Designs other people have published are in the shop.
The sentence that gets you in trouble is rarely the famous one. It's the ordinary one somebody registered first.