I'm currently reading the wonderful novel "Ancillary Justice" by Ann Leckie, and there's a political force who's name is "Radch" and everything that belongs to them is said to be "Radchaai", like "Radchaai ship". I wonder what is the correct pronunciation of these words? Particularly I have trouble deciding if "ch" is more like "k" or "tsh". I think it's "tsh" but am not sure since I've never met that letter combination before.
Even though someone might say that the described world and hence the name are fictional and may not correspond to the standard pronounciation rules for English language, I would claim the opposite is true since the book is written by an English-speaking american author in English language and is originally intended for the English-speaking audience. If not explicitly stated otherwise, invented words in fictional books must always correspond to the most standard pronounciation rules (i.e. not being exceptions) for the broad readers audience to properly converge on vocalization, especially taking all the marketing implications into account. So what I would appreciate is a statement from a native English speaker on how to properly pronounce this letter combination.