Both my parents spoke their grandparents' native languages at home (Swedish and Plattdeutsch) when they were very young, but stopped when their grandparents' ge

Both my parents spoke their grandparents' native languages at home (Swedish and Plattdeutsch) when they were very young, but stopped when their grandparents' generation passed. They passed on very little of that to me, so by third generation it seems to die out.