Programming languages (PLs), together with the corresponding tools (compilers, runtime support systems, linkers, libraries), are a key aspect of any software development. The characteristics and quality of languages and tools directly affect the software development quality and its compliance with the requirements. For these reasons, studies related to the analysis of all aspects of the PL (such as general design, static and dynamic semantics, compilation and interpretation issues, and much more) have not only applicable nature but also great fundamental importance.