IntelliJ IDEA Terminal doesn't set locale on macOS

Using the Terminal in IntelliJ IDEA on macOS, I get error messages from some shell utilities like Unknown locale, assuming C.  The locale command in the terminal tells me my settings are…

$ locale
LANG=""
LC_COLLATE="C"
LC_CTYPE="UTF-8"
LC_MESSAGES="C"
LC_MONETARY="C"
LC_NUMERIC="C"
LC_TIME="C"
LC_ALL=

However, if I check the locale settings in Apple's Terminal.app or iTerm2, I see…

$ locale
LANG="en_GB.UTF-8"
LC_COLLATE="en_GB.UTF-8"
LC_CTYPE="en_GB.UTF-8"
LC_MESSAGES="en_GB.UTF-8"
LC_MONETARY="en_GB.UTF-8"
LC_NUMERIC="en_GB.UTF-8"
LC_TIME="en_GB.UTF-8"
LC_ALL=

I have echo statements in my  ~/.bash_profile and ~/.bashrc, so I see that they are executed the same in all of the terminal apps.  So, why does IntelliJ IDEA's Terminal get it wrong?

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Versions:

• IntelliJ IDEA: 2025.2.3 (Ultimate Edition), Build #IU-252.26830.84
• Terminal (bundled plugin): 252.26830.84
• macOS: 15.7.1