[esrauch]

The Pennsylvania Dutch's historic linage is mostly from southern Germany (like Baden-Wuertemberg-ish). Dutch is something of an English language misnomer in this context.

[zwieback]

I grew up in Stuttgart (although I don't speak the dialect) and to me the poem read like someone from Frankfurt wrote it, so maybe a hair north of Baden Wuertemberg?

[ahartmetz]

It's Pfälzisch, which is almost indistinguishable from Hessisch (Frankfurt) in writing. It sounds somewhat different, though.