Lithuanian Hunspell dictionary consists of two files, namely an affix file (.aff) and a dictionary file (.dic). The data can be used for spell checking, morphological analysis, or synthesis of a Lithuanian word (e.g., https://sitti.vdu.lt/morfuoklis/lt). It is provided in two versions:
1. Standard language – files lt_LT.aff and lt_LT.dic;
2. Standard + substandard language – files lt-LT_plus_substandard.aff and lt-LT_plus_substandard.dic. Substandard Lithuanian dictionary version includes dialect and obsolete words, but without obscene or swear words.
All the files are plain text, encoded in UTF-8.
See more in Dadurkevičius, V. (2017). Lietuvių kalbos morfologija atvirojo kodo Hunspell platformoje (Lithuanian Morphology in the “Hunspell” Framework). Bendrinė kalba, 90, p. 1-15, (http://www.bendrinekalba.lt/Straipsniai/90/Dadurkevicius_BK_90_straipsnis.pdf).