For usage first terminology must be imported into termCollections of translate5 and the termCollections must be assigned to a customer.
At first after an import term attributes show up in the front end with exactly the same names, they have in the imported TBX file.
This might not be good for end users in most of the cases.
Another name can be assigned by adding a value in the column "labelText" in the DB table LEK_term_attributes_label of translate5. This has to be done only once for each attribute name. Currently this is the only way to give a better name / label to term attributes in translate5.