I did not see any mention of differences in punctuation. In American English, the comma and the period are always inside quotes regardless of logic. In British English, the comma and the full stop follow wherever the sentence dictates: inside the quote marks if it belongs to the quote, outside if it belongs to the sentence. e.g., Carefree means “free from care or anxiety”.

Also you may want to mention the differences in meaning of certain words. I embarrassed myself royally when I first arrived in the US and, in my search for school supplies, asked for “rubbers”!

Dear YSM:

Yes, this punctuation is not universal, but it is commonly practiced in Commonwealth countries. We should make clearer mention of it.

Also the grammar checker in Grammar Slammer Deluxe with Checkers gives users the option of checking grammar one way or the other.

We made a decision to stick with grammar, spelling, and usage, rather than vocabulary in our programs and web pages–but not this blog. That would open up a whole new paradigm. I have not checked, but I am sure that there are publications that deal with differences in vocabulary between the two sides of the pond. I have noted visitors to the USA have some difficulty with the use of the word “pants” when they go the UK.