I'm building a Flow where I want to show the dates of Sharepoint objects. I would like to have the format "Mån 23 maj, 2018", (In English: Monday May 23, 2018) localised in Swedish. I can't get the Swedish names of the days and months, however.
I have made an easy sample flow to test this, with this code:
formatDateTime(items('Tillämpa_på_vardera')?['Created'], 'dddd dd MMMM')but it comes out as
Wednesday 30 May
I have tried to set the regional settings in the settings panel to Sweden:

but it doesn't help.
In the support document https://docs.microsoft.com/en-us/dotnet/standard/base-types/custom-date-and-time-format-strings there is a parameter where you can set the localisation settings, but I can't get that to work in MS Flow.
formatDateTime(items('Tillämpa_på_vardera')?['Created'], 'dddd dd MMMM', 'sv-SE')gives me an error message.
I have also tried
formatDateTime(items('Tillämpa_på_vardera')?['Created'], '[$-sv-SE]dddd dd MMMM')which is the Powerapps syntax but that doesn't work either.
I'm out of ideas now. I think I should be able to get the localised weekday and month names but how?