There is no definitive answer to this question, as the 'most popular' programming language can depend on several different factors.Some of the most commonly-used programming languages include C/C++, Java, JavaScript, Python, and PHP.Each of these languages has its strengths and benefits, and different types of software are often developed using a combination of different languages.Overall, there is no single programming language that is best for every use case and project.Instead, developers must carefully consider the specific requirements and goals of their application before choosing a language or set of languages to use in their development process.