http to https redirect htaccess - .htaccess

Question

I was trying to edit my htaccess file to redirect from http to https.
This one works for all pages except the homepage for every language:
http://cinqueterre.a-turist.com/deu
redirects to
https://cinqueterre.a-turist.com/https://cinqueterre.a-turist.com/deu
It's a little complicated script
Here is it:
Update: I improved a little the script, now it's not such complicated, and doesn't work if I add https redirect
DirectoryIndex 1.php index.html$ index.php
ErrorDocument 404 /404.php
RewriteEngine on
Options -Multiviews
RewriteEngine On
RewriteCond %{HTTPS} !on
RewriteRule (.*) https://%{HTTP_HOST}%{REQUEST_URI}
RewriteCond %{HTTPS_HOST} ^www\.cinqueterre\.a\-turist\.com$ [NC]
RewriteRule (.*) https://cinqueterre.a-turist.com/$1 [R=301,L]
RewriteCond %{HTTPS_HOST} ^cinqueterre.a-turist\.com$ [OR]
RewriteCond %{HTTPS_HOST} ^www\.cinqueterre.a-turist\.com$
RewriteRule ^(rus|ita|fra|deu|ukr|pol|esp)\/index\.php$ https\:\/\/cinqueterre.a-turist\.com\/$1 [R=301,L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME}.php -f
RewriteRule ^(.+)$ $1.php [L,QSA]
#if its not a directory
RewriteCond %{REQUEST_FILENAME} !-d
#and it has a trailing slash then redirect to URL without slash
RewriteRule ^(.+)/$ /$1 [L,R=301]
Options All -Indexes
## EXPIRES CACHING ##
<IfModule mod_expires.c>
ExpiresActive On
ExpiresByType image/jpg "access 1 year"
ExpiresByType image/jpeg "access 1 year"
ExpiresByType image/gif "access 1 year"
ExpiresByType image/png "access 1 year"
ExpiresByType text/css "access 1 month"
ExpiresByType application/pdf "access 1 month"
ExpiresByType text/x-javascript "access 1 month"
ExpiresByType application/x-shockwave-flash "access 1 month"
ExpiresByType image/x-icon "access 1 year"
ExpiresDefault "access 2 days"
</IfModule>
## EXPIRES CACHING ##
<ifmodule mod_deflate.c>
AddOutputFilterByType DEFLATE text/text text/html text/plain text/xml text/css application/x-javascript application/javascript
</ifmodule>

Answer 1

Try getting rid of all of your redirects, they're in the wrong place.
You need to add redirects before this rule:
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME}.php -f
RewriteRule ^(.+)$ $1.php [L,QSA]
And you want something like this:
RewriteCond %{THE_REQUEST} \ /+.*index\.php
RewriteRule ^(rus/|ita/|fra/|deu/|ukr/|pol/|)index\.php$ https://cinqueterre.a-turist.com/$1 [R=301,L]
RewriteCond %{HTTPS} off [OR]
RewriteCond %{HTTP_HOST} ^(www\.)?cinqueterre.a-turist\.com$ [NC]
RewriteRule ^(.*)$ https://cinqueterre.a-turist.com/$1 [R=301,L]