I’m setting up a site using the Buy Button, and while I can change my “Add to Cart” text, I cannot seem to change the “Out of Stock” text. I would prefer it to read “Sold”, as I am doing a lot of unique one-off products.
There was an earlier thread showing how to do this, but it is now marked “out of date” and doesn’t work any more.
You can select Themes menu, click Edit language:
And after select Product tab / edit Sold out field: