Thanks for the translation, I wrote in Swedish to get help from someone in Sweden ;-)
Unfortunally it did not work, I have the same problem with the swedish letters Å, Ä and Ö.
Any other suggestions??
Can you post a link to the resource file?
I have merged the Swedish 1.20 version language pack with the English language pack and I can see those characters on a nopCommerce 1.50 install, so it may still be an issue with your file. Partial translated Swedish language pack (merged Swedish language pack 1.20 with English language pack 1.50). Try this language pack to see if the characters in question appear correctly.