Does it make it easier or harder to communicate when a language has those noun classes?

当一种语言有这些名词类别时，交流会变得更容易还是更困难？

Some people will use gender and class, (noun class)  interchangeably, which I think is probably the norm now.

有些人会交替使用性别和阶级（名词类），我认为这可能是现在的常态。