Problem:
user complains about not being able to import translated bilingual docs into Wordbee Editor.
Hint:
For such kind of issues it is always necessary to make sure that header of the table and first column (contains segments' numbers) has not been touched.
Usually if import does not work it means that it has been touched.
To avoid further complications the best way to proceed in such cases is to perform the export again, and copy/paste the translation from you translator file to this new and not modified file (without touching header and # column).
Then import will work as expected.