

Open -a /Applications/Safari.app -args -AppleLanguages '(de)' This command can start the Safari browser in French on your Mac without affecting language settings in Mac or other apps on it.

Open -a /Applications/Safari.app -args -AppleLanguages '(fr)' For example, if your Mac uses English and you want the Safari browser to use a different language, i.e French, German, you can type and execute a command in Terminal on Mac.
CHANGE MAC LANGUAGE TO ENGLISH CODE
You just need to run a single line of code in order to launch a program in any specific language on Mac. You can access it from Finder, Launchpad, or Spotlight. There are different ways to open the Terminal on Mac. Mac users can use it to change settings, troubleshoot technical problems.
CHANGE MAC LANGUAGE TO ENGLISH WINDOWS
Mac has the Terminal where you can run command lines, just like Command Prompt on Windows computers. Run applications in any specific languages on Mac In this guide, we will show you an easy and quick way to temporarily launch an app in a different language from your Mac system. This however could be annoying if you need to temporarily change the display language of certain apps on Mac. Thus if you need to run an app in a different language on Mac, you can go to change the system language first. When you launch a program on Mac, it will use your primary language. Many Mac apps also provide different language packs. However you can change the primary language from system setting to use other language as you wish on Mac. By default, your Mac will use the language of the country in which you purchased it.
