The Swedish translation is really good but under Joomla 1.5 the character encoding is UTF-8 and thus the umlaut characters in the Swedish translation must be exchanged for their HTML coded counterparts to be displayed properly.
An easy way to solve this is to exchange the following strings in the Swedish translation:
å replaces å
ä replaces ä
ö replaces ö
Å replaces Å
Ä replaces Ä
Ö replaces Ö
\u00E5 replaces å
\u00E4 replaces ä
\u00F6 replaces ö
\u00C5 replaces Å
\u00C4 replaces Ä
\u00D6 replaces Ö
I have updated the attached swedish.php file from my original post to the new version 1.02.
The 1.00 version had some capital letters converted to lower case by mistake.
The 1.01 version had the wrong character strings for the pop-up dialogues since they do not allow the ö syntax but instead require the \u00xx character encoding syntax.
To use the translation, just replace the original file in the 1.4.3rc version package.