I use the German-Chinese option for Skritter, so part of the words in my vocab lists are in German, the others in English. I noticed that I can choose the language (English or German) if I add a new word to the dictionary. But if the word is already in the dictionary, but only lacking the definition, I can't choose, but it seems that Skritter assumes I will always put a German definition. But honestly, I often just copy and paste the definition from nciku, unless it is something I really don't know in English, like 巧妇鸟 which means "wren" in English and "Zaunkönig" in German... I think it is a bit too troublesome to always change the language settings in the right corner for adding definitions in a certain language.
Could you please also offer the option to choose the language when you edit the definition. And is it possible to see, "in which" language a definition is, because I already added some definitions in English, until the Sentence "Add Deutsch definition" started to make me think about this problem...