Русско-англо-русский юридический словарь

In continental European jurisprudence and legal discussion, "the legislator" (le législateur) is the abstract entity that has produced the laws. When there is room for interpretation, the intent of the legislator will be questioned, and the court is directed to rule in the direction it judges to best fit the legislative intent, which can be difficult in the case of conflicting laws or constitutional provisions. (Wikipedia)

What is the difference between a legislator and a lawmaker?

They’re synonymous. Lawmaker is easier for the uninitiated to interpret, while legislator is more formal and correlates with the name of the body in which a legislator serves, a legislature. But both terms refer to a person who makes laws—and more precisely a person who serves in a lawmaking body, or legislature. (Quora)