Re: How should word "C'tis" be pronounced?
 

Anyone who wants a good idea about how English developed and what kind of influences it has had, read The Adventure of English. I don't remember the author's name, unfortunately and I'm not at home so I can't check, but it does a good job of showing what kind of things affect languages, how they develop and how dialects fit into the mix.

Re: How should word "C'tis" be pronounced?
 

It was initially a TV series by Melvyn Bragg I think, for ITV in the UK. I'd assume he wrote the book too.

Re: How should word "C'tis" be pronounced?
 

That's the one. Thanks.