In a perfect world you name every column correctly in the first try. However, more often than not software needs to be revised and columns need to be renamed. The only options I now know of to rename a column is to create an expression column or rename the actual column on the data model to create a new translation subject. Both have some disadvantages and feel very redundant for just a simple column rename action.
What would help is the option to create an alternative translation object for a specific object (for example a column). Or choose a different existing translation object.