MPAA Ratings – UK

Hi

I am new to Kodi and I am currently using the Titan skin. I am using the emby for kodi plugin to pull in my movies and tv shows. On emby my MPAA ratings are setup for UK so movies show up as GB-12, GB15, etc. However, when I pull my movies and tv shows into kodi the information for the MPAA is displayed as NR, as if it doesn’t understand the UK rating. However, when I go into movie information it shows the rating GB-**. How do I go about fixing this so that I can have my movies display the UK rating?