In New Zealand cookie usually means either home baked or home baked style biscuits / cookies (e.g. chocolate chip cookies). Biscuit usually means all other types generally bought at the shop (e.g. chocolate coated etc.). I genuinely suspect the Cookie Monster influenced this distinction.
It's frustrating when so often techy people produce something but don't go the slight extra distance to anticipate the needs of normal people getting inducted into using the software. You see it all the time.