You know how legal contracts have really small letters and big word, and how they are really long? This question is asking if there are any benefits to making those contracts like that ( difficult to understand) What use does it have for the people who give you the contract? I hope I helped :)

The language used in modern law can be traced back to former empires namely France, and England.

well, 'advantages' are good things or things which help you 'difficult to understand' is not a good thing and causes problems therefore, if you see a problem (such as making something difficult to understand) as something which will help you (such as concealing an unfavorable factor that will benefit you), then this is an advantage from your point of view. Blake