A way to find what plugin/theme a string is coming from?

Hi, it would be super useful to be able to search for a string across all locations… or at least across all plugins. In my case, strings like “Proceed to checkout” in the shipping cart and checkout pages are untranslated… I’ve checked in Woocommerce and they’re translated for my language (Costa Rican spanish). I’ve always created a translation for the theme from the argentinian spanish translation, but apparently neither of those locations is where the strings are coming from, and I’m at a loss on how to find them.

Is this possible somehow?

The page I need help with: [log in to see the link]