The option for external users: "Allow guests to delete channels" is translated to "Tillåt gästerna att ta emot kanaler". In english this would be "Allow guests to recieve channels".
A better translation would be "Tillåt gästerna att ta bort kanaler" or "Tillåt gästerna att radera kanaler"
I agree with You that this translation can be improved.
This type of improvement proposals have the best effect if you register them at the "user feedback site for Microsoft Teams (a.k.a. UserVoice)" so I recommend that You write a post there.
Vänliga hälsningar/Best regards, Magnus