Redirection by Language with .htaccess
#If your browser is En
#non case sensitive ([NC])
RewriteCond %{HTTP:Accept-Language} ^en [NC]
#Redirect user to /en/
#301 Redirect type (permanent)
RewriteRule ^$ /en/ [L,R=301]
#non case sensitive ([NC])
RewriteCond %{HTTP:Accept-Language} ^en [NC]
#Redirect user to /en/
#301 Redirect type (permanent)
RewriteRule ^$ /en/ [L,R=301]
Duplicate for more language. en, es, de, … etc.