Sinn Fein leader Michelle O'Neill has put the cost of implementing an Irish Language Act at around £3.5m.
Speaking in Magherafelt on Wednesday she said: "The election is not just about the Irish Language Act, although obviously it is a key issue.
"The DUP are trying to scare-monger around the cost of an ILA. The cost is nowhere near in the region of what the DUP have suggested.
"We would say it's actually around £3.5m."
Ms O'Neill insisted: "We don't need a new agreement. The ILA is something that has been previously agreed.
"What we need to see is the full implementation of the ILA and the other issues which are still outstanding from previous agreements."
Ms O'Neill was speaking to reporters after taking part in the NI Chamber of Commerce's current series of breakfast meetings in which the leaders of the five largest political parties in NI have been invited to outline their views on the local economy - pre-election.