Original: In some countries, such as in Spain and Portugal, the term for a bill differs depending on whether it is initiated by the government (when it is known as a "project"), or by the Parliament (a "proposition", i.e. a private member's bill).
Simplified: In some countries, such as Spain and Portugal, a Bill has different names depending on whether it comes from the government (e.g. "Project") or from the Parliament (e.g. "Proposition" or Private Member's Bill).