CMU Sphinx is actively developed, but I’m not sure how it is installed.
https://sourceforge.net/projects/cmusphinx/
Wine comments about DNS 12 https://appdb.winehq.org/objectManager.php?sClass=version&iId=26621
Wine comments about DNS 12.5 https://appdb.winehq.org/objectManager.php?sClass=version&iId=28034
Nice article on Dragon Naturally Speaking 12 on Linux. But be sure to read carefully, and check out the comments. This is an old article.
Installing Dragon Naturally Speaking 12 on Ubuntu 12.04 (Using PlayOnLinux)