How to translate many, much
Two words in the original word list have the meaning of "many": birov and ori'sol. No explanation is given on how they differ, so technically, you could use whichever sounds best to you. Alternatively, you may make a distinction between the usages of the two as some fans (such as MandoCreator) do:
birov: much (for uncountable nouns), some
ori'sol: many (for countable nouns), numerous, some
naysol: too many, countless
To determine which Mando'a words are countable and uncountable, see Plurals.