Bluefish is an intelligent piece of software that automatically adjusts its interface to the language of the operating system. The problem is, it doesn't give you a choice. If you want to choose differently, the manual says something like: "change the language of your operating system" - which is kind of difficult / impossible in Windows. But there is an obvious solution. Just go to the program's folder, generally in:
and erase all the sub-folders that don't correspond to the language you want. Easy really!
How I love smart software!!