They try not to. Obviously, if there are so many errors that the answer cannot be understood then marks are lost. However, occasional grammar and spelling errors are ignored.
‘identify 5 weaknesses’ would be looking for 5 problems with the system of internal control.
‘identify 5 audit risks’ is much wider and could include: a new IT system, high turnover in audit staff, high value but portable inventory, a cash based business. Poor internal control can itself be an audit risk.