Mutable:
able or likely to change:
the mutable nature of love
Language is not static, it is mutable.
Noted in “April 9, 2024,” Heather Cox Richardson, Letters From An American:
The [Arizona Supreme Court] explained: “A policy matter of this gravity must ultimately be resolved by our citizens through the legislature or the initiative process…. We defer, as we are constitutionally obligated to do, to the legislature’s judgment, which is accountable to, and thus reflects, the mutable will of our citizens.”