I have recently stumbled over a problem regarding the language used in Blogger Dashboard. As you probably know, Google will automatically chose the language from the country where the IP you are using is registered to and this also aplies to Google Blogger.
For such cases, it is easy to change the language even if you are living in a foreign country. Sign into Dashboard, then at the top right hand corner of the Dashboard right under your name, at the bottom is a link: "Change Language". Click that and change the language to your preferred language.