I was not able to open my own world, it kept crashing after the building terrain page, so I had successfully backed up my world and the copy of my world I created as well, they are now separate folders outside of the minecraft game itself. I have tried deleting my world, and then have successfully brought it back, but to no avail I can still not open my world, the game crashes everytime the "building terrain" page pops up, same with the copy world as well. I created a new world as well, and that one I can open up. I have no clue on what else I can possibly do to at the very least be able to play in my own original world. I hope you are able to help me. 

(Minecraft help said to report this as a bug.)

Steps to Reproduce:
1. Open Minecraft 
2. Click on my world called “Mon monde”
3. And then wait till the building terrain page pops up 

Observed Results:
Game crashes, and the app itself closes automatically 

Expected Results:
The building terrain page finishes loading, and I appear In my world