If you haven’t found the answer yet, I can help you with that.
Access an item created by you in your collection/single type.
Access Configure the view and click to edit some field.
Basically the content of “Label” is what you will use in the translation of the file, for example, if the name of your field is “description”, in the translation file you will use the key “description”(yes, just “description”), like this:
You can put any name, if you want to differentiate the “description” from other types of collection, for example, “descriptionApp” or “descriptionFile”, this will always be the identifier when translating.