There are other folders with different languages in this folder. They contain the entire text of the game. the text of each version is signed with a number at the end of the title. All you need to do is copy the folder with the language you will be translating from, rename it to your language, for example "fr", open any file and simply replace the text in quotes with your own, keeping the code inside the text. for example:
"Search for biomaterial 29.1":"\\N<\\N[1]> {Mary}, do you have a pair of sunflowers by some chance?",
It should be replaced with
"Search for biomaterial 29.1":"\\N<\\N[1]> {Mary}, as-tu par hasard une paire de tournesols?",
Or if you want to see the changes in the game, you can copy the en folder to another location and translate the text in the one in the Locales folder. When you're done, just rename the folder properly and give it to me.