This is an uncommon error, to my experience. All genuine NFS Carbon PC copies work, and have a language filter in them. By default, everything is in English.
If you have illegally downloaded Carbon from some third-party site, this is best why. Illegal downloads only work 2/5 times. I recommend that you uninstall it and go out and buy it properly. It's only $15.
Just like what he said in the second last sentence. There's not much of a solution towards this. Simply go out and purchase a proper one.