This approach looks great! Having a user toggle for locale makes sense to me.

pinging@ellisonbg for design consideration.

Could you please review ?

@samarsultan Can you please resolve the merge conflicts for this PR?

What is the current status? We are closing in on 5.1 release and if this is complete, then let's try to get it in there!

@gnestor ,Conflicts have been resolved.

The current status is having a mirrored UI with loading the dedicated Locale form momentJS.
For Numeric Shaping , I left it to the browser language ,instead of user selection, while loading the locale. So if the language is "ar" , you will see the Arabic locale is loaded and numbers are displayed in Arabic-Indic format.

@samarsultan Excellent!! How do I set locale or enable mirroring?

For now, you can do it by just setting the browser language to "ar" . However, it will be better to have a user toggle for locale as proposed above.

Doesn't seem to be working for me. Here's what my Chrome settings look like:

The notebook and dashboard are rendering LTR as usual...

You have also to ensure that "Display Google Chrome in this Language" is checked and probably you need to relaunch your browser.

Or you can simply do it from Firefox by just moving up the Arabic language. It will be easier to return it back to English.

Ok, it's working in Firefox. It looks great to me!

It looks like we can include this in 5.1 release assuming that there are no objections.@Carreau@minrk Would you care to review?

I'm going to mark this as 5.2 and will merge into master as soon as 5.1 is released. This will everyone a chance to use it before it's released.

5.1 is released so let's merge this and start testing it!

Notebook 5.2.0rc1 is available on PyPI so please give it a try 👍:

pip install notebook --pre --upgrade

Hello@gnestor and@rgbkrk.

Thanks for reviewing our code.
Could you please update the "README" file and the documentation with the way of enabling the above features?

If you have any comments,@ragabo will take over.

@takluyver Should we add the following fromhttps://github.com/jupyter/notebook/blob/master/notebook/i18n/README.md#how-the-language-is-selected- to the README?

jupyter notebook command reads the LANG environment variable at startup, (xx_XX or just xx form, where xx is the language code you're wanting to run in).
Hint: if running Windows, you can set it in PowerShell with ${Env:LANG} = "xx_XX".

The preferred language for web pages in your browser settings (xx) is also used. At the moment, it has to be first in the list.

I'd focus on getting the machinery for building and contributing translations in place first.

I've opened a couple of issues for that -#3102,#3103