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"This special issue, Innovating in the didactic second language scenario: new mobile,open and social models, is offered to the academic community to present the results and perspectives of the work of a selection of international researchers in the domain of Porta Linguarum. More importantly, the time is optimum for a specialized text that reflects in a mosaic-like way about a steady path of technological innovation that can be identified in the field of second language learning internationally. The focus here is on the key conceptsof mobility, openness, and collaboration, their interrelation and theoretical and methodological implications. [...]This first special issue in Porta Linguarum deals with the advantages and disadvantages that such networked mobile devices, their applications, and related conceptual frameworks can entail for students and the associated challenges for language teachers. We are grateful to the journal for publishing it and hope readers will find it useful, thought-provoking and, at times, inspirational.&#160;Article: To Innovate or not to Innovate in the Didactic Second Language Scenario (and How) - that Is the Question? (by coeditors)ACKNOWLEDGEMENTS The publication of this monograph has been partly funded by the following grants and/ or projects:• the SO-CALL-ME project (Social Ontology-based Cognitively Augmented Language Learning Mobile Environment), financed by the Spanish Ministry of Science and Innovation (grant ref. FFI2011-29829).• the eLITE-CM project, Edición Literaria Electrónica (Literary Electronic Publishing – grant ref. H2015/HUM-3426), evenly co-financed by - the R&#38;D Task Programme for Social Sciencies’ and Humanities’ research groups of the Comunidad de Madrid (Programa de Actividades de I+D entre grupos de investigación de la Comunidad de Madrid en Ciencias Sociales y Humanidades), and - the European Social Funds (European Commission) for the current programming period (2014-2020).We would like to thank the ATLAS (UNED) research group as well, for their constant inspiration, encouragement and support, and also all the reviewers and the authors of the volume, for their wonderful contributions, their comprehension and their patience. "Editors: Cristina Calle, Mª Dolores Castrillo, Antonio Pareja June 2016[cite]