Sentence:  Thus, when he drew up instructions in lawyer <WSD>language</WSD>, he expressed the important words by an initial, a medial, or a final consonant, and made scratches for all the words between; his clerks, however, understood him very well. 
Meaning of the word marked with <WSD> tags:  A sublanguage: the slang of a particular community or jargon of a particular specialist field.