STYLE GUIDE

One of the problems while trying to developed a Style Guide is that there are many spellings for the same place. Let me explain. Take Chit Lom for example - and area in Bangkok. But it is Chit Lom, Chitlom or Chidlom? Actually all are correct and used in various official capacities. The department store is called Central Chidlom but the adjoining skytrain station is Chit Lom. See my problem?