This debug command can be used to verify localization keys. Any keys that are unlocalized will be saved to the games log file (at Documents\Paradox Interactive\Europa Universalis IV\logs).
verify_loc
Search Our Database of 304 EU4 Console Commands
verify_loc
This is the only way to use the verify_loc console command. After running the above console command, any unlocalized keys will be output to Documents\Paradox Interactive\Europa Universalis IV\logs\error.log