I have nothing to do with this plugin. I just keep track of mentions of Swedish 🙂
This is probably handled by your database. Check the encoding and collation of the relevant database table /tables.
If a table is encoded with utf8mb4, then the collation utf8mb4_swedish_ci would give you the behavior you would expect.
Keep in mind that if you change the character encoding and collation for your database then you’re just changing the default values for any new tables you might create later, you need to convert the existing table, which is a bit trickier.
You can read more about how to fix these things at https://codex.ww.wp.xz.cn/Converting_Database_Character_Sets
It’s also quite possible that the support people with Loopia have a script that can help you out in no time.
@tobifjellner Thank you! However, this is too complicated for me. I asked ChatGPT to produce a shortcode in PhP instead.