Automatic Lemmatization of Old Church Slavonic Language Using A Novel Dictionary-Based Approach

Old Church Slavonic (OCS) is an ancient language, and it has unique challenges and hurdles in natural language processing. Currently, there is a lack of Python libraries devised for the analysis of OCS texts. This research is not just filling the crucial gap in the computational treatment of OCS language but also producing valuable resources for scholars in historical linguistics, cultural studies, and humanities for the development of further research in the field of ancient language processing. The main contribution of this research work is the development of an algorithm for the lemmatization of OCS texts based on a learned dictionary. The approach can deal with ancient languages without the need for prior linguistic knowledge. Preparing a dataset of more than 330K words of OCS and their corresponding lemmas, this approach integrates the algorithm and dictionary efficiently to achieve accurate lemmatization on test data.