If the localization of KTurtle to you favorite language does not exist yet, you might concider making it. In the documentation of KTurtle you can find some pointers on how to start. Also make sure to see the contents of the tdeedu/kturtle/scripts directory since it contains Rafael Beccar's nifty tranlaton perl scripts that can make translating KTurtle human resource friendly. If you face difficulty translating feel free to contact one of the KTrutle developers.