Well, yes - this is a somewhat extreme case but the problem is the same even for internal-use-only corporate systems. And it becomes even more acute when (as it is my case) your first language is not the same originally used to develop the first version of the system.

(Imagine an ERP system built in UK and adopted and customized by a French company, for example: IT would probably use 20% of French terms/names, the rest will be in English... Business will do the opposite).