I guess civil law gives you less room to explore ideas like "living" statutes and laws that gain and change meaning over time; if there was such a change, you'd write it down?
Regardless: whether you're a textualist or realist, in the US you're still operating in a common law system.
> What American lawyers call "textualism" is how most continental european courts interpret written laws.
They were making a direct comparison between "textualism" and civil law, but didn't include the terms. I found the comparison interesting and thought I'd make it easier for anyone else who was confused by OP's comparison.
I realize on re-reading that this comparison is much less prominent than I thought it was in OP's comment, so it makes sense that my links would seem out of place. An explicit quote of that sentence would have helped.
Common law is basically just the US, UK, AU, and NZ. Outside the anglosphere it's mostly civil law.
[0] https://en.m.wikipedia.org/wiki/Common_law
[1] https://en.m.wikipedia.org/wiki/Civil_law_(legal_system)