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, many (for uncountable nouns), countless (when used with countable nouns)
ori'sol: numerous, many (for countable nouns)
(Ori'sol can also be used when translating "some.")
To determine which Mando'a words are countable and uncountable, see Plurals.