The ability to change labels in the system is critically important. Firstly from a linguistics perspective, the UK terms and spelling do not match US terms\spelling. Additionally, Firms are not consistent with terminology. The EU uses Jobs whereas most Firm's in the US call them Engagements (some use Matters). Additionally, Partner (as one example) is used in Job Portfolio's and Client Search which makes sense however, if you are a user who is flipping from screen to screen, this can be confusing. The ability's to add client partner in a Job search screen is equally important but also reinstantiates the point, that the Partner field needs to be clearly distinguished.
Ability to Change Labels