This previous work on American Finnish reveals a lower frequency of accusative case and partitive case in heritage bilingual speakers with more pronounced changes the farther removed the generation was from the immigrant generation. In his interviews he elicits personal narratives, has participants complete picture identification tasks with simple cartoons, and give translations of sentences. He documents what changes the language seems to have undergone, notably the leveling of several cases including the accusative and partitive. While the partitive and accusative were vulnerable, other cases including the illative and ablative remained robust in the speech of these speakers, though adjective case endings were especially prone to deletion. These previous works focus primarily on Finnish speakers in Minnesota and Michigan with Wisconsin underrepresented.