Should we be making separate pages for different spellings (e.g. "jewelry" vs "jewellery") and having them link to one main page (like someone has already done for "atc" and "artist_trading_card") or just ignoring alternative spellings?
I know that this is an old post but I feel like I need to elaborate. A practice when people create separate pages for different spellings/misspellings can be regarded as shady by Google. Nowadays, all major search engines will treat jewelry and jewellery the same. To cover all the gaps, optimize the page for the main term (e.g. jewellery) but include the word jewelry twice in the copy.