I don't speak English properly.

我英语说得不好。

I don't speak English correctly.

我英语说得不正确。

I don't speak English. Could I have Chinese service? I can speak both Mandarin and Cantonese.

我不会说英文，可以要中文服务吗？我会说普通话和广东话。

Could you lead me to the counter of Air Canada, I need to transfer to Montreal. I don't speak English. Thanks.

我不会说英文，可以要中文服务吗？我会说普通话和广东话。