Tell me why English cities or Independent cities there representing Canada is not enough.... and try to answer that without any nationalism bias.
Canada is important, indeed, but why Canada should be present as a civilization? Arguments such as being the largest etc does not make sense in game. Late games are already too crowded and takes too long to end the turn: adding 1 more civilization for merely "decoration" if there's no strong arguments why then I'm not supporting it.
Even the civilization that everybody thought just fill-in-the-empty-space like Tibet or Kongo, have several world-changing achievement that lasts for long time.
Tibet: Spreading and preserving Buddhism in central Asia, Mongolia, China, etc.. and present some challenge to India and China.
Kongo: Slave trade
Also, we've discussed enough about Native American. Please.