Olga Kellert, Ph.D. (2013), Freie Universität Berlin, habil. (2022), was a private lecturer at the Georg-August-Universität Göttingen and is now Associate Professor at Arizona State University (USA). She has published on linguistic variation and change of Romance languages such as French, Spanish and Italian, Catalan and Sardinian. She is currently working on NLP for endangered languages in Latin America and on Sentiment Analysis in Spanish (varieties).