I had expected 'Memorized' instead. It is displayed in Edit->Preferences->Register:Actions:Tab order includes Transfer on Memorised Transaction and has the key in dconf: /org/gnucash/general/register/tab-to-transfer-on-memorised. While I could grep through the program and the docs to change the strings, I do not know, how to convert the dconf key.
DConf is just reflecting the GSettings key. It's not worth changing, it's not user-facing. BTW, both the string and the preference are from https://github.com/Gnucash/gnucash/commit/8ca1487a21a7a2b623da86b0834bcee52917cae5 written 10 years ago by Colin Law (who is British). Since it's taken so long to notice maybe it's not worth worrying about.
You *can* change the translatable strings as far as I'm concerned, but don't change the settings name/key. That would require uses to manually reset that setting.
