So you've found the perfect plugin: it has all of the functionality you need, it's within your budget, and there's surprisingly awesome support. Great – but what if you need to change just one little line of text? What if you want to do something simple like change “Add to Cart” to “Add to Basket”? Or change “Related Products” to “See these related products”?
If you're lucky there's a filter for that particular string but sometimes there isn't. Then what do you do?