Well, according to BDB there is a cognate (balaja) in Arabic, but its
meaning is not given and I don't have an Arabic dictionary to hand.
to shine, be happy, be glad, be delighted (Wehr)
HALOT, BTW, conveniently provides glosses of a lot of its cognates.
You're still better off checking the sources yourself, but for those who
don't have the resources, it's a handy substitute.