Toward Micro-Dialect Identification in Diaglossic and Code-Switched Environments

10/10/2020 ∙ by Muhammad Abdul-Mageed, et al. ∙ 0

Although the prediction of dialects is an important language processing task, with a wide range of applications, existing work is largely limited to coarse-grained varieties. Inspired by geolocation research, we propose the novel task of Micro-Dialect Identification (MDI) and introduce MARBERT, a new language model with striking abilities to predict a fine-grained variety (as small as that of a city) given a single, short message. For modeling, we offer a range of novel spatially and linguistically-motivated multi-task learning models. To showcase the utility of our models, we introduce a new, large-scale dataset of Arabic micro-varieties (low-resource) suited to our tasks. MARBERT predicts micro-dialects with 9.9 baseline. Our new language model also establishes new state-of-the-art on several external tasks.

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