I want to know the answer to the following question:
What type of extensions do these other character encodings have?
All the background I'm provided with is that "Other international standards bodies have ratified character encodings such as ISO/IEC 646 that are identical or nearly identical to ASCII, with extensions for characters outside the English alphabet and symbols used outside the United States, such as the symbol for the United Kingdom's pound sterling (£).". Is that enough to answer the question?
Answer: yes