I am able to define what those mean, yes. A family means “family” and a mermaid means “mermaid”. Same answer for the rest, none of your emoji examples are complicated to interpret unless you add text to accompany them, and even then, at most you are going to misinterpret their tone, not the specific emoji.

Wether we should devote time making sure they are the correct skin tone is orthogonal to my original comment.