Just like with Skyrim, Bethesda included the string files for the Automatron DLC inside the archive files. This would not be a problem except that Fallout 4 has changed archive formats and the BSA reader will no longer work for that. BA2 files require a different format to be read to be able to see the files inside them.

I'm not sure what all needs to be done to work with this, but the TES5Edit code for the Fallout 4 branch has the ability to read these files since the strings are displayed correctly there for the official DLC (and main game too).