Enlighten me, what does JAP stand for (other than a contraction of 'Japanese').

On the thread topic, at school in the '60s I was taught that 'Welch' and 'Welsh' are not synonymous - 'Welch' meaning to renege on a deal, and 'Welsh' meaning a native of Wales. Different pronunciation, completely different words, and that's how I've used them this past 50+ years. Worked fine for me.