I'm surprised more people haven't queried the relevance of the How should Nikon be pronounced question - surely this is way off topic? Rowland Shaw has posted a link to the Japanese Language site in the comments - should this perhaps be migrated?
Despite the fact that Nikon is a Japanese company, that does not necessarily mean this is a question about the Japanese Language. Pronunciation is of a word is generally dependent upon the language it is spoken in, and therefor it will be spoken differently in different locales. There is no single site that this question really belongs at, as it could fit on our site, the Japanese Language site, or even the English Language site. It could be migrated...but to which one? At least here on PhotoSE, it does fit regardless of language...it is a question about a camera manufacturer, and while pronunciation is not specifically on topic, the community doesn't seem to think it is particularly off-topic in this case either. If a new SEN language site pops up in the future where it would actually fit (i.e. General Languages and Usage), I could see it being migrated where there, as it would be a better fit.