Google Chrome v63:

  • LC_ALL=en_GB ➡︎ navigator.language = 'en-GB' 👍
  • LC_ALL=en_CA ➡︎ navigator.language = 'en-GB' 🤷‍♂️
  • LC_ALL=en_SG ➡︎ navigator.language = 'en-US' 😞