costs: to ensure fairness in electoral campaigns, candidates may only spend a certain amount on their campaign, commonly referred to as election spending limits.
costau: rr mwyn sicrhau tegwch mewn ymgyrchoedd etholiadol, dim ond swm penodol y caiff ymgeiswyr ei wario ar eu hymgyrch, a chyfeirir at hyn yn aml fel terfynau gwariant etholiadol.