The term 'KING'S LANG.' is an abbreviation for the phrase 'KING's English', which is a term used to refer to the English language as it is spoken and written in the United Kingdom. The crossword solutions for this term are ENG, which stands for English. Therefore, the term 'KING'S LANG.' is an abbreviation for the phrase 'KING's English', which is a way of referring to the English language as it is spoken and written in the United Kingdom.