I think I understand this correctly. You're asking why can't we access the Akashic records and obtain a skill that we didn't know in our physical body prior to the journey?
I think you only really have access to whatever accumulated knowledge and skill you've obtained in your past lives. I read somewhere that the records have everything you've done and will do? So I'm guessing it's just infinite knowledge that you yourself already have in some form. As for the languages, I read something very biblical related that said that sort of phenomenon is a gift of some sort, so I'm not too sure. I hope that helped in some way.
I think you only really have access to whatever accumulated knowledge and skill you've obtained in your past lives. I read somewhere that the records have everything you've done and will do? So I'm guessing it's just infinite knowledge that you yourself already have in some form. As for the languages, I read something very biblical related that said that sort of phenomenon is a gift of some sort, so I'm not too sure. I hope that helped in some way.