Where are the text strings for the new UI??

[Tzipirigu]

I'm trying to translate the game into multiple languages, but I can't find where the new strings for the new UIs might be, like editing the world/creating a new world, etc. However, there are also the old ones in the file, which if I translate them, nothing happens, but if I change the language of the game to another, the new interface translates.

For example, in Notepad++, I looked for the description from setting the world seed, but it says that it does not find the desired text in the file at all!! I also downloaded the latest version released!

Where did Mojang hide these strings??? Or won't they let us translate them??