Family Membership: renaming of Spouse role to Partner or similar

Currently many of our members are choosing Other Adult as the secondary family role ( instead of Spouse ) .  Perhaps they are not married and would rather be identified in a different manner . 

We will be changing our family membership setting so that the Other adult age is limited to 18 and under ( to limit 2 adult members per family ) .  We anticipate members will not be happy with this setting change , so a simple renaming of a field might go a long way . 

Thanks .