I was looking to see if we have a tag about the "personal a" and it did show up in the list of tags as personal-a. However, there were no questions associated with it. I tried adding it anyway, and failed. I tried to recreate it and failed at that too. What should I do? I do think it would be a helpful tag. It's something people ask about, and I think it would be a good topic for a canonical Q-A.
It seems that the "personal-a" tag redirects to the preposiciones tag. We're trying to have our tags written in Spanish, with English tags that redirect to the Spanish ones, similar to what other language-related sites do.
The personal a affects direct objects, so I suppose such questions should be tagged both as complemento-directo and preposiciones, or any other relevant tag. The problem I see is that the personal a does not have a specific name in Spanish. Reading the Spanish grammar by the RAE I read "complemento directo introducido por la preposición a", which is quite a long name for a tag.
Right now there are only two question tagged with those two tags, and it seems that none of them asks about the personal a. Maybe we should retag the questions that do with those two tags. Please, if anybody has another opinion do not hesitate to share it with us in another answer.
There is a Q-A about the personal a that is quite good (in fact, I'm thinking about proposing it as a canonical Q-A): ¿Debo usar la 'a personal' con un personaje antropomorfo?
In his answer there, Pablo uses the term a personal (writing in Spanish). From this I conclude that that's what this topic is called in Spanish.
Therefore, I have created a tag a-personal as an experiment. I propose that this be synonymized with "personal-a", and then this will be problem solved!
(There is another Q that uses the term --in English-- "personal object," which also looks quite good. I suggest that that be synonymized with "a-personal" as well.)