Why Study Programming Language:

• Increased capacity to express ideas
 

Develop software may limit on the kinds of control structures, data structures, and abstractions. Þ Finding a way to solve problems is limited. Programmers can increase the range of their software-development thought processes by learning new language constructs. It is good to collect many features of languages and simulate them in other languages.

• Improved background for choosing appropriate languages
 

If a programmer just knows a few languages without investigating them, he may limits himself to choose a language that he learned to solve a problem.  The language that he chooses may not be an appropriate one.

• Increased ability to learn new languages
 

Once a thorough understanding of the fundamental concepts of languages is acquired, it becomes far easier to see how these concepts are incorporated into the design of the language being learned.  A survey of popularity of programming languages can be found at http://www.tiobe.com/index.php/content/paperinfo/tpci/index.html

• Better understanding of the significance of implementation
 

Knowing the implementation issues and why languages are designed the way that can help a programmer debug programs. For example, programmers who know little about how recursion is implemented often do not know that a recursive algorithm is typically far slower than an equivalent iterative algorithm.

• Increased ability to design new languages
  Better use of languages that are already known
 

A critical examination of programming languages will help in design of complex systems, and more commonly.  It will help users examine and evaluate products.

• Overall advancement of computing
 

"The most popular languages are the best languages." - it is not always correct. After you study "concepts of programming languages", you will agree the above statement.