  Reo is a formal coordination language. In order to assess and evaluate its
capabilities, we need a multi-perspective Language Evaluation Framework. Langar
(Language Analysis for Reo) is a framework aimed to provide such an evaluation
method. In this paper, we introduce Langar. Based on a review on various
language evaluation methods, a tool-kit for useful evaluation techniques are
provided. After Reo Evaluation, this method and tool-kit also could be used for
another programming, computational and even natural languages. Furthermore, two
suggestions for some future efforts and directions are provided for software
engineering and software methodology communities.
