A language construct is a syntactically allowable part of a program that may be formed from one or more lexical tokens in accordance with the rules of a programming language.The term 'language construct' is often used as a synonym for control structure. A language construct is a syntactically allowable part of a program that may be formed from one or more lexical tokens in accordance with the rules of a programming language.The term 'language construct' is often used as a synonym for control structure. In PHP print is a language construct.