Yes they are. Biscuits are made the world over. Many cookies are in fact biscuits. They are baked, then dried.

Your link proves my point:

In most of North America, nearly all hard sweet biscuits are called “cookies”, while the term “biscuit” is used for a soft, leavened quick bread similar to a less sweet version of a scone.

Americans made a scone and then started calling it a biscuit. That’s the only inconsistency. Americans are wrong.

However they are right about aluminum.