Hi. I'm gonna answer your questions here.
1. When you start the game, you have the option to add a command to scene title list. It'll be like New game, continue, exit game, language: English. You press ok on Language and it'll switch to another language.
2. The CSV file will be copied to the game folder automatically but it won't encrypt. This is better if you want people to mod your game or translate your game on their own.
3. If you don't want to localize pictures then you can simply not do it. It's optional and not required.