Spec link in the "Processing LanguageIds" algorithm in Annex C shouldn't go through an interstitial page
A step in the canonicalization algorithm reads:
Else if there is an extlang subtag, then apply Step 3 of https://tools.ietf.org/html/bcp47#section-4.5 to remove the extlang subtag (possibly adjusting the language subtag).
The link in that text has that literal appearance – odd in its own right. But more oddly, its target is
i.e. going through some Google interstitial page for no reason.
This should be something like "Step 3 of BCP 47 Section 4.5", with the section part being a direct link, for consistency with other places in the spec.