Notice how in the second season, she (Brak’s mom) had a British accent, but recently the original voice actress came back and she lost it? Kinda weird…
"The greatest show to ever be shown on the show show-er!" - Brak
"Time is an abstract concept used by carbon-based life forms to measure their decay!!" - Thundercleese
By the way, the guy who does Thundercleese’s voice also does Frylock’s (just not quite so bombastically!)