Low-resource Language Identification of English and Kokborok Code-Mixed Sentences

There is a growing need for a model for automatic word-level language detection due to the growing usage of multilingual text. To identify code-switched and code-mixed sentences in the Kokborok language and English at the word level, we propose an unsupervised model. Numerous studies on code-mixed text have been published, including for several Indian languages. However, to the best of our knowledge, our work represents a pioneering effort, being the first to identify languages for low-resource English-Kokborok language pairs. We have employed a method that merges data from a frequency dictionary with data from a character n-gram model. The Viterbi technique combines a character n-gram Markov model with a frequency lexicon to aid in precise language identification at the word level. The proposed method performed well, with a word-level accuracy of 93.15%, which is better than the BiLSTM-CRF model of 88.5% and the rule-based baseline of 85.3%. This demonstrates the effectiveness of combining lexicon and statistical methodology for handling low-resource languages without depending on massive annotated datasets.