Language and signs are peculiar to every community. Even a group of friends have a peculiar jargon which sometimes can only be understood by them. Professional jargon is more or less the same while certain aspects can be distinguished. Unique feature of a study and profession results in the use of special language style. Those are distinctive to the group which uses it and people strange to such study or profession find it difficult to understand. If you are a person wanting to understand why there is such a thing called professional jargon, here are some answers.
Peculiar terms and concepts
A profession includes a certain stream of study and there are peculiar terms and concepts involved in such studies. Such are inevitable of being peculiar as the ones who study them can only understand them. These are also understood as professional jargon. For an example there are concepts, such as separation of powers, constitutionalism, proportionality, rule of law, etc in law which are understood by the legal scholars alone. The same way, other studies also involve their own concepts, terms and theories which are considered to be resulting in creation of a professional jargon.
To have precise interpretations
With the years of practice or years of learning professionals tend you use peculiar words to mean certain things and it is with the use of those words rather than by any other colloquial terms they can give the precise definition to the words. Lay people might not be able to understand them and even if they do they are more likely to interpret them different to an interpretation that will be given by a professional. Understanding of document or a statement of a particular professional becomes even harder when they are in another language as ordinary translators cannot translate them. That is why now there are technical translation services in which the translators have the knowledge on the technical terms and practice.
As an identity of a hermetic group
The professionals who use professional jargon are mainly lawyers, doctors, economists, etc. There are certain features of a profession, being distinct from other occupations. Professionals have their own code of conducts and there are certain rules they have to follow. Hence, professionals are being recognized as a distinct group of people who have undergone years of studying and practice and who do a great service to the society. The professionals consider it to be a prestige to be able to be a part of the group and they try to maintain their distinctiveness among other members of the society. Professional jargon is also used in maintaining the distinct identity, by the professionals.