Button text for subscriptionbutton in Membership Premium

My client wants this text to read as buy now, as this is more compliant with the new eu legislation around selling online. I can't find a way to send a text attribute to that shortcode.

I am a php dev, so don't be afraid of telling me I need to put a workaround in place, I'll just need pointing in the right direction - i.e. which function builds the button and where I'd find it. I'd then create my own function for that theme rather than edit core files :slight_smile: