Hiya, thanks for the quick response, I got it set in the core theme and it is perfect, but for some reason it isn't showing in the custom theme (Black Rain V2 by Crip).
I have modified modifications.english.php in /BlackRainV2/Languages/ but there is no trader.english.php in that directory.
Any clues where else I could look to sort this?
Edit: Nevermind, I edited the files via the webhosts online editor and forgot to empty the forums cache, it is all working perfectly now. Thank you very much for your help and also for the mod.