Activities of the Institute of the Lithuanian Language cover wide range of domains:
- conducts scientific research on the standard Lithuanian language, Baltic languages and proper names, written heritage, geolinguistics, terminology and sociolinguistics;
- develops and fosters Lithuanian as a state language: addresses the issues of language standardization, performs linguistic expertise;
- participates in the formation of the strategy and tactics of the research and usage of the state Lithuanian language in Lithuania;
- organizes scientific expeditions for language data collection;
- accumulates Lithuanian language resources, compiles databases and manages their protection, development and use;
- in cooperation with the higher education institutions trains scientists of the highest qualification in the field of philology;
organizes and hosts scientific conferences; - promotes Lithuanian language and the results of its’ scientific research among the society.