This is the common types, similar to Dieffenbachia seguine easily available in many nurseries and often freely showcased as indoor plants in many places. Often too, I find these pruned and thrown off and new offshoots sprouts out from the cane but also because it is exposed to elements - snails and slugs does most of the damage on the new unfurling leaves with lots of eaten or torn in between.
This one is more spaced out in the splashes without any visible pattern.
How to Care & Cultivate Dumbcane Plant:
Dumbcane - Dieffenbachia - Best Indoor Plants