Please use "on-topic" and "off-topic" instead of "in scope" and "out of scope"
While I have no problem understanding what's meant in the text when "in scope" and "out of scope" are used, the sites primarily use the text "on-topic" and "off-topic" to reference those concepts. For example, in the Meta Stack Exchange help center, there are 90 results for "on-topic" and 32 results for "off-topic", while there are only 7 results for "scope". "Scope" is also used to reference the scope of what's being asked within a question, rather than only the scope of the site, which makes it less clear what is being referenced in some cases. I suspect the use of the terms "in scope" and "out of scope" will be more confusing to people who are not that proficient in English. It's also better to maintain consistency across the site when using a term to refer to a concept. Doing so reduces confusion.