Do you have any examples? As a Finnish speaker the Swedish "a" sounds the same. "Pappa", "framtiden" etc.
It's "ä" and "e" which have swapped uses, but it's not exactly consistent (e.g. "Järnvägstorget" where first ä is close to the Finnish ä, second ä is closer to e but so is the e at the end)
It's "ä" and "e" which have swapped uses, but it's not exactly consistent (e.g. "Järnvägstorget" where first ä is close to the Finnish ä, second ä is closer to e but so is the e at the end)