Nate Weaver wrote: > Upon further digging, this is an issue in gettext's code on macOS: > The function _nl_language_preferences_default (in langprefs.c) specifically > breaks early when it sees the literal string "en" in the list (from the > "AppleLanguages" defaults key), but not when it gets "en-US", etc. Sorry I missed your other followup. As you mentioned, the fix is at https://savannah.gnu.org/bugs/?49560. There isn't a gettext release yet with that fix, so perhaps https://github.com/Homebrew/homebrew-core/blob/master/Formula/gettext.rb could be updated to apply that fix as a patch (https://docs.brew.sh/Formula-Cookbook#patches). Thanks again and sorry for the noise, Jonathan