The file you are searching is Resources\Data\Languages\English.txt
Optionally, here is a pretty good automatic translator: www.deepl.com/translator and in Infolinks -> Concepts -> Steam Workshop you can find how to upload your translation to Steam Workshop.
[2022-01-05] Echo's Collection Anyone is free to take whatever I do, pretend like they did it and do with it whatever they want, without asking me for permission, crediting me or anything else.