No way to choose the spellchecker language.
Recently, I decided to change my locales environment variables to english ... but I still write to my french friends in french ... I would like to be able to use the spellchecker in those situations.
Why not a general setting (maybe only shown in the advenced preferences editor) to choose the global spellchecker language. And a per-contact setting to be able to choose the language for each contact ... and also maybe the ability to change the spellchecker within the chat.