Ajax overwrites changes

I think this is probably beyond the scope of this plugin, but thought I’d ask.

Is there any way to chnage the priority so that this plugin performs the change later?

I’d like to use this with Woocommerce to change the text “£0.00” in the cart/checkout to “Free Gift”, but the problem is that the page loads and then the cart reloads itself using AJAX, overwriting the change.

Related to this, as the plugin makes the change at load, any AJAX changes to the cart can’t be adjusted by the plugin either.

It’s a shot in the dark, I know, but this plugin is the closest I’ve found to something that allows me to make the changes I want.