There are actually two orca cultures With two distinct languages. There are pods that cruise the shorelines, travel slower and are more peaceful. The other culture lives out in the sea, travels fast and is more aggressive.
There has to be more than just two.
Think about how different pods attack prey and what they prey on.
There are at least 4 different types of Antarctic Orcas.
Distinct ‘genetics’ and ‘races’ - language more than likely different too.