Notes/Diaries: First off, notes and diaries are different. Notes do not have any narration. Diaries do. To set a narration to a diary, you must add [voice narrationfilenamehere.ogg][br] before your dairy's entry text. Your lang file entries for a diary would look like this:
<CATEGORY Name="Journal">
<Entry Name="Diary_MyDiary_Name">My Diary</Entry>
<Entry Name="Diary_MyDiary_Text">[voice mydiarynarration.ogg][br]My diary text here!</Entry>
</CATEGORY>
If you want to add multiple pages of text with narration that follows it, you add another [voice narrationfile.ogg][br] in your entry. You must add a [br] before it as well. Your diary's lang file entry will look like this:
<CATEGORY Name="Journal">
<Entry Name="Diary_MyDiary_Name">My Diary</Entry>
<Entry Name="Diary_MyDiary_Text">[voice mydiarynarration1.ogg][br]My diary text here![br][voice mydiarynarration2.ogg][br]My diary's next page here![br][voice mydiarynarration3.ogg][br]My diary's third page here!</Entry>
</CATEGORY>
For the emotion stones and level doors, select them in the viewport and set their text category/entry in the entity tab.
Make sure you create a category and entry in your .lang file that corresponds to your emotion stone or level door.