Shouldn’t you be able to add these (Mostly Sunny) to your map file and map to translate them? I don’t use the weather binding but I believe that’s how it works.
if you would like to have the already translated texts from the weather provider (most do have that Option), be sure, you configure the binding with the language:
location.<locationId>.language
with wunderground there’s some difference, because the language codes don’t reflect the ISO-norm, therefore german language would be “DL” and not “DE”, that’s what didn’t work in my weather.cfg at first, which i took from the documentation (it says “(see provider homepage for supported languages)” - but…)
so for german language and wunderground returning those bits, it would be:
apikey.Wunderground=xxxx
# location configuration, you can specify multiple locations
location.home.name=daheim
location.home.latitude=46.23
location.home.longitude=12.23
location.home.provider=wunderground
location.home.language=DL
location.home.updateInterval=15
location.home.units=si
note: at least with wunderground API, the language is case-sensitive!