I suggest adding a label called mekasho yomi, which refers to a robot that completely imitates human women and has no essential difference from human beings (such as only some mechanical features)

We have a tag-what-you-see policy where, in general, only things that are visually apparent are important. As such, all characters who are 100% visually identical to humans are treated as humans (and solo human images are generally deleted, see human_only for a few examples that weren't.)
You will also have a very hard time convincing people to use tags where the name is neither intuitive nor popular. "Shota" is accepted vernacular in communities that deal with Japanese media despite being a non-English word, and "mekamusume" is a more common term for characters of this nature.

weibilin said:
I suggest adding a label called mekasho yomi, which refers to a robot that completely imitates human women and has no essential difference from human beings (such as only some mechanical features)

Normally we would make tags in English, otherwise people won't use/know about them.
Searching for "mekasho yomi" also yields zero results on Google, making it even more alien of a name.

What does this mekasho yomi have in difference to a normal android, so much so that it necessitates a separate tag?

We don't need another obscure non-English term that few people will know to use, and fewer will ever search, let alone have a clear definition that follows TWYS and isn't handled by other tags.

watsit said:
We don't need another obscure non-English term that few people will know to use, and fewer will ever search, let alone have a clear definition that follows TWYS and isn't handled by other tags.

This word comes from the Japanese " メカ少女 ", see
https://dic.pixiv.net/a/%E3%83%A1%E3%82%AB%E5%B0%91%E5%A5%B3?utm_source=pixiv&utm_medium=referral&utm_campaign=search_top

If it’s 100% like a human and features solo character then the content is not allowed on this site.

weibilin said:
This word comes from the Japanese " メカ少女 ", see
https://dic.pixiv.net/a/%E3%83%A1%E3%82%AB%E5%B0%91%E5%A5%B3?utm_source=pixiv&utm_medium=referral&utm_campaign=search_top

lafcadio said:
...and "mekamusume" is a more common term for characters of this nature.

@Lafcadio is right. The more common term used is "meka musume" (メカ娘)^{[1] [2]} and it does already exist in a limited number under the mecha_musume tag.

thegreatwolfgang said:
@Lafcadio is right. The more common term used is "meka musume" (メカ娘)^{[1] [2]} and it does already exist in a limited number under the mecha_musume tag.

Okay, but in my impression, most of meka musume are not materially different from human beings in appearance

weibilin said:
I suggest adding a label called mekasho yomi, which refers to a robot that completely imitates human women and has no essential difference from human beings (such as only some mechanical features)

That sounds like it's synonymous to gynoid, which is a gendered form of, and thus aliased to android. If it's visually identical to a human or a cyborg human, it's going to be rejected for irrelevancy. If it's sufficiently mechanical enough to not be outright rejected, then it should be tagged as android.