An Unsupervised Method for Discovering Lexical Variations in Roman Urdu Informal Text Abdul Rafae author Abdul Qayyum author Muhammad Moeenuddin author Asim Karim author Hassan Sajjad author Faisal Kamiran author 2015-09 text Proceedings of the 2015 Conference on Empirical Methods in Natural Language Processing Lluís Màrquez editor Chris Callison-Burch editor Jian Su editor Association for Computational Linguistics Lisbon, Portugal conference publication rafae-etal-2015-unsupervised 10.18653/v1/D15-1097 https://aclanthology.org/D15-1097/ 2015-09 823 828