What is Law Latin?

Legal Definition
Law Latin, sometimes written L.L. or L. Lat., and sometimes derisively called Dog Latin, is a form of Latin used in legal contexts. While some of the vocabulary does come from Latin, many of the words and much of the vocabulary stem from English. Law Latin may also be seen as consisting of a mixture of English, French and Latin words superimposed over an English syntax.

Law Latin was the language in which the legal opinions of English courts were recorded at least until the reign of George II. It was also used as the language of writs, royal charters, letters patent and many other legal instruments. As late as 1867, Law Latin was still in use in England and Scotland for some legal instruments.
-- Wikipedia
Legal Definition
An altered form of Latin, historically used in legal documents and general legal practice. Law Latin was a hybrid mixture of Latin, French, and English. It gained popularity as a reactionary response to Law French, which was earlier forced upon England in the wake of the Norman conquest of 1066.
Legal Definition
The corrupt form of the Latin language employed in the old English law-books and legal proceedings. _ It contained many barbarous words and combinations.
-- Black's Law Dictionary
Legal Definition
The Latin language as used in old forms and proceedings in England.
-- Ballentine's Law Dictionary