Vision Montreal leader Louise Harel is hesitating over whether to debate in English.

Harel has been invited along with Union Montreal leader Gerald Tremblay and Projet Montreal leader Richard Bergeron to take part in a televised English-language debate at CTV News.

A debate in English is outside her comfort zone, said Harel Sunday, adding that she wants to ensure she gets her point across clearly.

"I can speak English, but for a debate it's another ball game. We will evaluate that," said Harel.

Tremblay said it's a matter of letting all Montrealers hear the issues.

"There's over 25 percent of the population that speaks the English language and we have to communicate with them, so I will participate in every debate - French and English - because I think it's a question of respecting Montrealers," said Tremblay Sunday.

Bergeron, who takes language classes to improve his English, agreed with Tremblay.

"At least 20 to 30 per cent of the population of Montreal understands English far better than French, and for them to know what are the commitments of the candidates for mayor - it's very important. They need to know, they have to know, and it's their right to know and the leaders have to be there in the debate," said Bergeron.

The proposed debate would take place a week before the municipal elected, which is slated for Nov. 1.