She added that Plaid Cymru and the SNP, along with the Greens in England, had provided people across the UK "with a collaborative alternative to the traditional combative Westminster politics."
Plaid Cymru leader Leanne Wood said:
"For the first time, a general election to the UK Parliament is not simply multi-party, but multi-national.
"The inclusion of Plaid Cymru and the SNP in televised leaders' debates has had the dual impact of challenging traditional, London-centric orthodoxies, and projecting voices from the nations to the UK level.
"Along with the Greens in England, our parties have provided people across these islands with a collaborative alternative to the traditional combative Westminster politics.
"Plaid Cymru and the SNP have provided the most articulate and compelling counter-arguments to the proponents of crippling austerity.
"Our vision of an economy that has the fiscal breathing space to flourish and public services that are strong, is a unifying vision that would be to the benefit of all.
"It says much of the state of the Westminster parties that it is they who peddle the rhetoric and politics of division.
"Among the most discussed images of the election campaign so far is that of my embrace with my friends and colleagues Nicola Sturgeon and Natalie Bennett, following the last UK leaders' debate.
"It was an embrace that didn't only signify the common cause between us. It represents how all of us in these isles can come together and embrace a new politics."