%D 2023
%L uninimx8800
%R doi:10.1109/ACCESS.2023.3312730
%X Non-word and real-word errors are generally two types of spelling errors. Non-word errors are misspelled words that are nonexistent in the lexicon while real-word errors are misspelled words that exist in the lexicon but are used out of context in a sentence. Lexicon-based lookup approach is widely used for non-word errors but it is incapable of handling real-word errors as they require contextual information. Contrary to the English language, real-word error detection and correction for low-resourced languages like Urdu is an unexplored area. This paper presents a real-word spelling error detection and correction approach for the Urdu language. We develop an extensive lexicon of 593,738 words and use this lexicon to develop a dataset for real-word errors comprising 125562 sentences and 2,552,735 words. Based on the developed lexicon and dataset, we then develop a contextual spell checker that detects and corrects real-word errors. For the real-word error detection phase, word-gram features are used along with five machine learning classifiers, achieving a precision, recall, and F1-score of 0.84,0.79, and 0.81 respectively. We also test the proposed approach with a 40% error density. For real-word error correction, the Damerau-Levenshtein distance is used along with the n-gram model for further ranking of the suggested candidate words, achieving an accuracy of up to 83.67%.
%K Real-word errors, spelling correction, spelling detection, spell checker
%P 1-1
%A Romila Aziz
%A Muhammad Waqas Anwar
%A Muhammad Hasan Jamal
%A Usama Ijaz Bajwa
%A Ángel Gabriel Kuc Castilla
%A Carlos Uc-Rios
%A Ernesto Bautista Thompson
%A Imran Ashraf
%J IEEE Access
%T Real Word Spelling Error Detection and Correction for Urdu Language