Brunei doesn't really have a 'motto' per se, but rather a national philosophy called 'Melayu Islam Beraja' (MIB), or 'Malay Muslim Monarchy'.
'Malay' refers to the Malay culture, people and language. 'Muslim' refers to the country's strong faith and adherence to Islam. 'Monarchy' refers to the governing of the country by its beloved ruling monarch Sultan Hassanal Bolkiah.
MIB permeates and influences all areas of Bruneian government, education and daily life.
(You can read more about the concept of MIB at http://melayuislamberaja.info/pengenalan/definisi/. The site is in Malay, though Google Translate does a decent job of translating.
North Borneo's motto is 'Pergo et Perago'.
The motto of Sabah is 'Sabah Maju Jaya'.
The motto of Dainese is 'Inspired by humans.'.
The motto of Puntland is 'Star of the North'.
Guildford High School's motto is 'As One That Serveth'.
The motto of Shediac is 'In Unum Ad Summum'.
The motto of Wabush is ''.
Lesotho's motto is ''.
Walsingham School's motto is 'No Motto'.
The motto of Dainese is 'Inspired by humans.'.
Belmont Academy's motto is 'as the co-motto'.
Motto is a noun.
Iceland has no official motto.
The motto of Puntland is 'Star of the North'.
The motto of FIFA is 'For the Game. For the World.'.
The State Motto of Texas is Friendship
Guildford High School's motto is 'As One That Serveth'.
The motto of Broomfield Academy is 'Motto: Character Matters'.
The motto of Antofagasta is 'Glory, motherland and tenacity is your motto and your honor'.