But for all this confusion and cases, (it's weird yet niece, nice, and Nice but Einstein?) it's all good. The flexibility of the language allows for all of it. Until you get the grammar police. Taking perfectly understandable sentences and dubbing them wrong for not being spelled right or following the right grammar. I love that as a writer I can just claim poetic licence whenever I so want. So sanguine and it's bloody name can be in my writing blood-thirsty and not enthusiastic. Screw it. I'll use it wrong it's poetic licence and frankly the language is dynamic to be used and abused. Who cares about spelling and grammar if communication is conveighed?
Besides read ald werks and you'll find all sorts of odd spellings there in proper English.
Like Mark Twain, said:
"Before the spelling-book came with its arbitrary forms, men unconsciously revealed shades of their characters and also added enlightening shades of expression to what they wrote by their spelling, and so it is possible that the spelling-book has been a doubtful benevolence to us."