Is the Lone Wolf party limit hardcoded?

Originally Posted by "english.xml"
<content contentuid="hbaf5c48eg86eeg4947gb884g6508d4dbd1fe">[1] provides +[2] Max AP, +[3] Recovery AP, +[4]% Vitality, +[5]% Physical Armour, +[6]% Magic Armour, and double invested points in attributes and combat abilities (except Polymorph ability), while you are adventuring solo or with at most one companion. This bonus is temporarily removed while there are more than two members in the current party.</content>

The strings "with at most one companion" and "more than two" aren't using template variables, so I'd assume so, but maybe I'm missing something.

Anyone know if the party limit for Lone Wolf can be changed? In a script, perhaps?