Logic and algorithms in computational linguistics 2021 (LACompLing2021) This book assesses the place of logic mathematics and computer science in present day interdisciplinary areas of computational linguistics. Computational linguistics studies natural language in its various manifestations from a computational point of view both on the theoretical level (modeling grammar modules dealing with natural language form and meaning and the relation between these two) and on the practical level (developing applications for language and speech technology). It is a collection of chapters presenting new and future research. The book focuses mainly on logical approaches to computational processing of natural language and on the applicability of methods and techniques from the study of formal languages programming and other specification languages. It presents work from other approaches to linguistics as well especially because they inspire new work and approaches