Ah yes. Developers love giving people the ability to customise their product. Of ourse that can have massive implications for information developers and end users alike. There is no easy way around this as there is no way you or anyone else will know what the user is changing these field names to.
RoboHelp has variables that you could use, but you'd have to know the value (field name) before you create your output. There could also be a lot of them. Another way, and a way I did many years ago when I had this problem, is to either use the default field names or keep the descriptions generic. Either way you'd have to have some topics on the customisation aspects that you could like to or highlight in some way.
If you knew 100% what customisation was to be applied, maybe you could tackle this programmatically. The issue here would be the sheer number of variables that you may have to use in your RH project. Personally I'd not go there.
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