Filter duplicate rows based on a field

Question

I have several records (bills) that are basically duplicates of each other, except for one field, which represents the language that bill is in.

For example:

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Answer 1

 select
 BillID,Account,Name,Amount,max(Lang)
 FROM Bills 
 WHERE Account='abcd'
 group by BillID,Account,Name,Amount;

Same as user2407394 except without the ID in the groupby, since that would return 3 too.