Russian word data adapted from FrequencyWords, Russian 2018 corpus.
Author / maintainer: Hermit Dave and contributors.
Source: https://github.com/hermitdave/FrequencyWords/blob/master/content/2018/ru/ru_50k.txt
Original data derived from OpenSubtitles2018 / OPUS.
Data license: Creative Commons Attribution-ShareAlike 4.0 International.
https://creativecommons.org/licenses/by-sa/4.0/

Changes: restricted to Cyrillic words of 4–12 letters, removed duplicate
entries and a list of explicit-language fragments, selected and shuffled
5,000 demonstration words, grouped entries by letters at each of positions 1 through 5,
prioritized diverse prefixes and limited each group to 320 words.
The adapted word dataset in words.json is provided under CC BY-SA 4.0.
This data license does not apply to the application source code.