The dictionary bundled with ruMorph (rumorph/data/ru.dict) is built from:

- the OpenCorpora dictionary (https://opencorpora.org), revision 417150, as compiled
  in the pymorphy3-dicts-ru package version 2.4.417150.4580142, including its
  P(tag | word) estimates from the OpenCorpora corpus, licensed under the Creative
  Commons Attribution-ShareAlike 3.0 Unported License (CC BY-SA 3.0);
- counts of word form annotations in the training parts of the Universal Dependencies
  treebanks, release 2.18 (https://universaldependencies.org), licensed under the
  Creative Commons Attribution-ShareAlike 4.0 International License (CC BY-SA 4.0):
  - UD_Russian-Taiga (https://github.com/UniversalDependencies/UD_Russian-Taiga)
    by Olga Lyashevskaya, Olga Rudina, Natalia Vlasova and Anna Zhuravleva;
  - UD_Russian-GSD (https://github.com/UniversalDependencies/UD_Russian-GSD),
    annotated and converted by Google, by Ryan McDonald, Vitaly Nikolaev and
    Olga Lyashevskaya.

The ruMorph dictionary is an adaptation of that data and is distributed under the
Creative Commons Attribution-ShareAlike 4.0 International License (CC BY-SA 4.0):
https://creativecommons.org/licenses/by-sa/4.0/

The ruMorph code is distributed under the MIT License (LICENSE.txt).
