wp-forecast comes with various translations, located in the directory lang.
if you would like to add a new translation, just take the file
wp-forecast.pot (in the wp-forecast main directory) copy it to
.po and edit it to add your translations (e.g. with poedit).
please be aware that the number codes stand for the weather-situations. you can see the mapping in en_US.po. there are also the letters N, S, W, E they stand for the winddirections and can be translates either.
there are different translations for the german language using different charsets. the default de_DE uses UTF-8, de_DE-iso-8859-1 uses iso-8859-1 and de_DE-latin1 uses HTML entitites.
to use a different as the default just rename the appropriate file to de_DE.po and de_DE.mo




