Joseph Abiola, O., Olalekan Abiola, T., Pichardo Lagunas, O. and Sidorov, G. 2026. Hope Speech Detection: A Comparative Study across Four Languages. International Journal of Combinatorial Optimization Problems and Informatics. 17, 2 (Feb. 2026), 215–221. DOI:https://doi.org/10.61467/2007.1558.2026.v17i2.1279.