You're a native american.
In your everyday speech with your wife, friends, etc, do you say "with regard" or "with regards"?
('amerI'qa'nganna' SoH. qaStaHvIS Hoch jaj yIn, be'nallI'vaD juppu'lI'vaD latlh(pu')vaD joq bIjatlhtaHvIS, < with regard > bIjatlh'a'? pagh <with regards > bIjatlh'a'?)