Add abbreviation of the country in the url address

[deuxk]

Hello,

I try to make a change to my current htaccess for now my url looks like> sitename.com/en/filename.ext
I want to get to have an address resembling this:
sitename.com/ca/​​en/filename.ext (in case the country is Canada and french language)
sitename.com/us/en/filename.ext (in case the country is United State and English language)
sitename.com/eu/en/filename.ext (in case the country is Europe and English language)
sitename.com/en/filename.ext (in case the country is not mentioned and English language)

Here is the current structure of my htaccess

AddDefaultCharset utf-8
SetEnv CA America/Montreal

Options -Indexes +FollowSymlinks
RewriteEngine On
RewriteBase /

<IfModule mod_rewrite.c>

RewriteCond %{REQUEST_FILENAME} -f [OR]
RewriteCond %{REQUEST_FILENAME} -d
RewriteRule \.(?:css|png|jpe?g|gif)$ - [L]	 #RewriteRule \.(?:css|png|jpe?g|gif|ttf|js)$ - [L]	
	 
RewriteRule (fr|en)/(.*) /$2?language=$1 [NC,L,QSA]

#language, detect and set
RewriteCond %{QUERY_STRING} !(?:^|&)language=[^&]+
RewriteCond %{REQUEST_URI} !^/(?:fr|en)/
RewriteCond %{HTTP:Accept-Language} ^fr [NC]
RewriteRule .* /fr/$1 [L,R=permanent]
						
RewriteCond %{QUERY_STRING} !(?:^|&)language=[^&]+    
RewriteCond %{REQUEST_URI} !^/(?:fr|en)/
RewriteRule .* /en/$1 [L,R=permanent]	
</IfModule>

For now I try lots of things, but nothing happens ... if you have an idea, it would be greatly appreciated!

pleasure