I checked it in one of the runbot instances and it seems to be working fine. You can check one of the running runbot instances at:

https://runbot.odoo.com/

I was not able to login to the runbot `You do not have access to this database or your invitation has expired. Please ask for an invitation and be sure to follow the link in your invitation email.`

I was able to login, please ignore my last comment (need 500 karma to delete my own comment?!)

U are correct, it does work in the runbot... but still doesn't solve the problem when installing from github

I did a diff on the CSS and it seems that the CSS on my installation is not RTL, and the runbot css is RTL

unfortunately I cannot paste the screen image to show it

It seems that some files that creates the RTL css is missing on my installation since I search for `.oe_module_icon` and it appears only in 1 file and is set to `float: left;` while in the runbot css it is set to `float: right;`

This explain the problem, the question is: how to solve it?

in runbot, it seems that the file `web.assets_backend.css` is generated in a different way when using RTL .

although both cases reference `base/static/src/css/modules.css` the `float` is somehow changes from `left` to `right`

I found the following:

For languages with right-to-left interface (such as Arabic or Hebrew), the package `rtlcss` is

needed:

#. Download and install `nodejs <https://nodejs.org/en/download/>`_.

#. Install `rtlcss`:

.. code-block:: doscon

C:\> npm install -g rtlcss

#. Edit the System Environment's variable `PATH` to add the folder where `rtlcss.cmd` is located

(typically: `C:\\Users\\<user>\\AppData\\Roaming\\npm\\`).

Tried it both on windows and in Ubuntu 18 (Docker) and still not RTL

Thanks for posting the final solution