Hello,I made a new data_*** folder to test something,I copied for example the republic side with all my custom units from the old data_*** folder to the new data_*** folder.
Can I overwrite editlocalize with the editlocalize from my old data_*** folder?Because I don´t want to add every units and give them their names.

The editlocalize is only the tool used to edit the names. The actual names that you edited are stored in .cfg files somewhere.

Is it possible that it is german.cfg english.cfg etc. ?

Yes.

ok thanks