Code-switching is about dealing with alternative languages in speech or text. It is partially speaker-depend and domain-related, so completely explaining the phenomenon by linguistic rules is challenging. Compared to most monolingual tasks, insufficient data is an issue for code-switching. To mitigate the issue without expensive human annotation, we proposed an unsupervised method for code-switching data augmentation. By utilizing a generative adversarial network, we can generate intra-sentential code-switching sentences from monolingual sentences. We applied proposed method on two corpora, and the result shows that the generated code-switching sentences improve the performance of code-switching language models.
@article{arxiv.1811.02356,
title = {Code-switching Sentence Generation by Generative Adversarial Networks and its Application to Data Augmentation},
author = {Ching-Ting Chang and Shun-Po Chuang and Hung-Yi Lee},
journal= {arXiv preprint arXiv:1811.02356},
year = {2019}
}