CALL and complexity - short papers from EUROCALL 2019

The theme selected for the 2019 EuroCALL conference held in Louvain-la-Neuve was 'CALL and complexity'. As languages are known to be intrinsically and linguistically complex, as are the many determinants of learning (additional) languages, complexity is viewed as a challenge to be embraced collectively. The 2019 conference allowed us to pay tribute to providers of CALL solutions and to recognize the complexity of their task. We hope you will enjoy reading this volume as it offers a rich glimpse into the numerous debates that took place during EuroCALL 2019. We look forward to continuing those debates and discussions with you at the next EuroCALL conferences!