The official language of the Indian state of Assam is Assamese, an Eastern Indo-Aryan language. Assamese, the sole native Indo-Aryan language in the Assam Valley, has been heavily impacted by the nearby Tibeto-Burman languages in terms of lexicon, phonetics, and grammar. Its grammar is renowned for its highly inflected forms, and both honorific and non-honorific formulations can include a variety of pronouns and plural nouns. Additionally closely linked to Bengali, Assamese lacks grammatical gender distinctions like Oriya and Bengali. On the other hand, The Bodo language is a variety of dialects of the Tibeto-Burman branch of the Sino-Tibetan languages. Assam, Meghalaya, and Bangladesh are all home to speakers of the Bodo language, which is spoken in northeastern India. It shares linguistic kinship with the Dimasa, Tripura, and Lalunga languages and is written in Bengali, Latin, and Devanagari scripts. Another name for Next Word Prediction is Language Modeling. Predicting what word will be spoken right away requires commitment. It is one of the primary functions of NLP and has a wide range of uses. Our objective is to create this model as quickly and efficiently as possible. RNNs can interpret prior material and forecast words since they have a lengthy short-term memory, which might be useful for users when building sentences. This method creates words by using letter-by-letter prediction, or letter-by-letter prediction. Users can benefit from next word prediction, which makes typing faster and more accurate. The Assamese and Bodo languages rely on next word prediction since multiple characters can be created by pressing the same consonants combined with different vowels, vowel combinations, and special keys. As a result, we present a Long Short Term Memory (LSTM) network model for Assamese and Bodo next word prediction. With 63,300 point sentences, we test the suggested network model, and it achieves 96 per cent accuracy. In addition, we contrasted the suggested model with cutting-edge models like the LSTM. The proposed network model offers a promising outcome, according to experimental findings.