I think it is not very nice to fire her, since you said your maid is 好好,好勤力.
我囝囝有自閉傾向 - better ask an expert to help.
但係仲自閉過我個仔,佢唔多講野 - it is her personality.
You cannot guarantee the new maid will be as good as her bor (if the new one is no good, then you have to pay her one more month's wage and air ticket)...you know it is hard to find a good maid.
我個新工人都到了幾日,我同佢講野,佢好多時會答我yes or
ok!原來佢跟本就聽唔明香港既英文,因為佢未黎過香港做野,又未去過其它地方做野,只係係菲律bun做過,我知道後,就要佢,慢慢學香港既英文,我會講慢D,另外,唔好品答我yes or
ok!要答就全句答!yes i understand!後尾佢都做到我要求!
教工人預了要用好多心機,可能要重複講幾次。慢慢黎啦!
My personal opinion, if your helper is quite nice at work I think you can give her still some time to adapt. I have autistic kid too. Autistic kids are also kids, maybe you can say they are always like small kids, so the same thing applies to their willingness to accept new maids, just like any other kids do. All it needs is to take time. Even if you hire another who is most talkative and outgoing, could you ensure that the new one is willing to talk to your kid? I guess not. How many maids I have seen who are so talkative would only talk with their friends and are so lazy to talk with (or even look) at their little bosses.
If I were you, I would spend some time everynight to chat with her, like asking her to describe how everything has been going on with the little kid, more in detail about how well he eats, how he behaves when getting in and out to school, if he helps himself in changing his pants, etc. In that case, she must ast least answer you and thus to speak up. Get her involved in whatever training you are doing with your kid. Ask her to comply the way you are training your little kid too during day time. I think if she is not bad she should gradually become concerned about your child.