Hi there!
Well the problem can lay in your language files which are 'chosen' in the Jumfish configuration. First it's important to have desired language files installed for your template then joomfish works properly as long as its files are properaly translated and your website has defined proper charset (for Russian Windows 1251 or KOI8-R). That's sure thing
If you website stays in French while setting it to Russian please check carefully Jumfish configuration and if you have appropriate language files.
However as far as GK Weather module is concerned you must remember that it is based on Google API and so it retrives data from XML file for specified location, language.
And so for example as the pdf HelpFileWeather says:
Please specify language for forecast - some examples:
en for english
fr for french
it for italian
pl for polish
Important!!! Some language need more specific identification.
For example, for portuguese language you need to identity if
is portuguese from Portugal (pt-PT) or portuguese speak on
Brazil (pt-BR).
so
ru for Russian and then you have to give a location like Moscow.
You can see an example of XML file provided by Google API for this very location clicking at this link:
http://www.google.com/ig/api?weather=Moscow,Russia&hl=ruhttp://www.google.com/ig/api?weather=Moscow,Russia&hl=ru
I hope I helped a bit
By the way what's the weather in your city now?