Muhammad Morsy Elmallah


2024

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Arabic Diacritization Using Morphologically Informed Character-Level Model
Muhammad Morsy Elmallah | Mahmoud Reda | Kareem Darwish | Abdelrahman El-Sheikh | Ashraf Hatim Elneima | Murtadha Aljubran | Nouf Alsaeed | Reem Mohammed | Mohamed Al-Badrashiny
Proceedings of the 2024 Joint International Conference on Computational Linguistics, Language Resources and Evaluation (LREC-COLING 2024)

Arabic diacritic recovery i.e. diacritization is necessary for proper vocalization and an enabler for downstream applications such as language learning and text to speech. Diacritics come in two varieties, namely: core-word diacritics and case endings. In this paper we introduce a highly effective morphologically informed character-level model that can recover both types of diacritics simultaneously. The model uses a Recurrent Neural Network (RNN) based architecture that takes in text as a sequence of characters, with markers for morphological segmentation, and outputs a sequence of diacritics. We also introduce a character-based morphological segmentation model that we train for Modern Standard Arabic (MSA) and dialectal Arabic. We demonstrate the efficacy of our diacritization model on Classical Arabic, MSA, and two dialectal (Moroccan and Tunisian) texts. We achieve the lowest reported word-level diacritization error rate for MSA (3.4%), match the best results for Classical Arabic (5.4%), and report competitive results for dialectal Arabic.

2022

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Gulf Arabic Diacritization: Guidelines, Initial Dataset, and Results
Nouf Alabbasi | Mohamed Al-Badrashiny | Maryam Aldahmani | Ahmed AlDhanhani | Abdullah Saleh Alhashmi | Fawaghy Ahmed Alhashmi | Khalid Al Hashemi | Rama Emad Alkhobbi | Shamma T Al Maazmi | Mohammed Ali Alyafeai | Mariam M Alzaabi | Mohamed Saqer Alzaabi | Fatma Khalid Badri | Kareem Darwish | Ehab Mansour Diab | Muhammad Morsy Elmallah | Amira Ayman Elnashar | Ashraf Hatim Elneima | MHD Tameem Kabbani | Nour Rabih | Ahmad Saad | Ammar Mamoun Sousou
Proceedings of the Seventh Arabic Natural Language Processing Workshop (WANLP)

Arabic diacritic recovery is important for a variety of downstream tasks such as text-to-speech. In this paper, we introduce a new Gulf Arabic diacritization dataset composed of 19,850 words based on a subset of the Gumar corpus. We provide comprehensive set of guidelines for diacritization to enable the diacritization of more data. We also report on diacritization results based on the new corpus using a Hidden Markov Model and character-based sequence to sequence models.