Multi-lingual site: How to set different text directions?

Hello,
My site has 2 languages, English which has left-to-right direction of course, and Arabic which is right-to-left.
English articles are have their own categories, and so are arabic ones. 
What I did, is that I created another copy of Museum template and assigned it to the English sections, and leftthe main template for the Arabic sections because there are many. 

The problem is that the English template still views the site as right-to-left, and uses arabic words for search, author,date ...etc

Hoe do I set it to be left to right and English?
Site: www.hayatt.net
Thanks.
 

Sorry, here is the English site:
www.hayatt.net/english-site.html

Hello,

If you are using Joomla 4, 5, or 6, and have installed all languages properly, the LTR or RTL mode should be selected automatically. However, on the English version of your website, when I look at the source code the first line is:

This means that this page (that you claim is English) actually has set language to "ar-aa" and direction RTL.

Please read these pages to learn how to install additional languages in Joomla properly and completely:

www.slideshare.net/erictiggeler/creating...-guide-eric-tiggeler

The procedure is similar for all Joomla versions.

Regards,
Milos

I installed both languages but I guess the problem is that I did not activate "Language Filter" Plugin.
Thanks!