See from the second-half of this video: https://www.youtube.com/watch?v=pJpOWlD_7OI
Varnam runs entirely on your device. There is NO DATA-SHARING with anyone or any servers. There is also NO TRACKING and NO ANALYTICS. In fact there is no internet communication at all.
Varnam learn words you type and store it in your device only.
We have public Telegram & Matrix groups. See about page.
If you know GitHub, you can file issues directly at https://github.com/varnamproject/govarnam/issues
Or you can submit them at https://community.smc.org.in/c/dev/varnam