The Doctor Dances (2) - S1-E10
Corrected entry: Written on the side of the German bomb Jack is sitting on are the words "Schlechter Wolf. which is a mistranslation of the English "Bad Wolf. It should have been "Böser Wolf. Böse = bad, as in evil. Schlecht = bad, as in rotten, as in 'the milk has gone bad'. You are unlikely to say that the milk has 'gone evil'
Correction: Given that the name Bad Wolf is from the company that runs Satellite Five in the future & that is where Rose got the name from I don't think that she's going for the correct terminology when she scatters the words through time, just that she makes the connection between all the instances of seeing Bad Wolf & getting back to Satellite Five.