The Fourth International Conference on Computational Linguistics in Bulgaria (CLIB’2020) was held on 25-26 June 2020 in Sofia, Bulgaria at the Bulgarian Academy of Sciences. This international conference aims to foster the NLP (natural language processing) community in Bulgaria and to further the cooperation with Bulgarian researchers working in NLP around the world through establishing a forum for sharing high-quality scientific work in all areas of computational linguistics and NLP. 25 invited talks and peer reviewed papers discussed issues around lexical semantics, discourse, language resources, fake news detection, discourse and the European Language Grid project. Mozaika supported this event as a bronze sponsor, along with ELRA (European Language Resources Association).