Tolerated/Accepted Culture Assimilation
More historically-inspired passive assimilation. Province capitals that have a dominant tolerated or accepted culture passively convert their province* to the dominant culture rather than the primary culture.
Note there may be some performance impacts as the mod’s logic checks every province in the game on a monthly basis for dominant cultures.
*This cannot be made more granular to achieve the same effect on a per-location basis, due to certain hardcoded limitations in EU5.