Update app.json Español

Reopened the ticket I hope this time I got it right. Sorry guys I am learning to use github. 
Fixed a couple of lines, I am not sure if I had to translate those. They were not comments so I assume they needed to be translated. I am not sure about the PET EGGS translation but I did not find the original file to see if it was correct. Cheers.
UID: 5b46c729-019a-4ba4-bda1-6f63c471c28e