> People who move to another country on their own, without a company transfer, and/or who intend to stay there indefinitely, are not expats.

That first part is a really strange criterion which I've never seen before.

As for staying indefinitely, that's why I don't necessarily consider myself an immigrant - I've been here for six years, but the future is always uncertain. I might have a different opinion if Germany allowed dual citizenship through naturalization, but they don't.