> American or British recipes

American or old British recipes; ours are all metric now.

The exception is perhaps teaspoons/tablespoons, but those are trivial metric values (5ml and 15ml), so easy enough to scale and convert if you don't have the right measuring spoon handy.

That is probably it, never would have occurred to me. When doing international recipes doing a translation/conversion is not always straight forward. I cook a lot and often it becomes a investigation into the ingredients and what to replace rather than a simple conversion of units. Not something Alexa does.