Does Applescript include and support Regular Expressions?

I'm starting to study regular expressions, and I just discovered AppleScript. So I wondered if AppleScript - or some other Mac utility - offers features that help with regular expressions.
I'm trying to figure out a variety of search and replace operations. For example, I'd like to copy a table, then replace every row in Table A that includes the word "billion," replacing every row with the word "million" in Table B.
I just wondered if AppleScript offers any shortcuts for figuring out complex regex operations like this.
Thanks.

While AppleScript has the usual kinds of comparisons, I don't know if I would consider them regular expressions. The Terminal gives you access to various utilities that do use regular expressions - see the bash and re_format manual pages.

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Does Applescript include and support Regular Expressions?

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