I think in the sentence below, I shouldn't use "due to" as I start it with "One of the main reasons" but I would like to use "due to" because the reason is just a simple phrase. How can I restate this sentence with "due to"
I may say "this is due to …", but it is just one reason not the only reason.
As a matter of fact, many native speakers of English have problems with spelling correctly. One of the main reasons for this is due to the complex orthography of English.
Update: I myself find this alternative
Part of the problem is due to the complex orthography of English.
Best Answer
If you write
You are basically saying the same thing twice, roughly "this is because".
So either you write
or
Now you want to explicitly say that the orthography is but one reason, so you have to "tone down" the due to by some restricting expression, like
Overlap with your edit:
Yes, your sugestion works too.