BUR #9775 has been approved by @evazion.
create alias mysterious_text -> fake_text
This tag is meant to be for text in imaginary scripts like post #3473924, but "mysterious text" is unfindable because nobody's going to think to search for that name.
We already have faux text but that is meant to be for existing non-latin alphabets used wrong.
Both are small tags so I don't see much risk for mistags. Otherwise I'm open for suggestion for better names.