How similar should two questions be to qualify as duplicates?
I'm thinking particularly of Add an Arab Word within an English Document and Arabic and greek inline text in russian document pdflatex. But the question is more general.
Conceptually, these questions are the same and the the user who asked to second question was able to answer his own question with the help of the older question.
But adding and an Arabic word into an English document is not actually the same as adding one into a Russian document…