How to set language prefix in htaccess?

Question

htaccess

Hello everyone, please tell me how to set up htaccess so that if the url does not start with a language, then it will default to en. Here's what I googled, but it doesn't work for me.

RewriteCond %{REQUEST_URI} !(/(en|gr|ru)) [L]
RewriteRule ^(.*) /en/$1 [R=301,L]

Answer 1

I solved the problem myself, maybe there is something superfluous, but in general it works.

RewriteCond %{REQUEST_URI} ^/$
RewriteRule ^(.*)$ /en/ [R=301,L]

RewriteCond %{REQUEST_FILENAME} -d [OR]
RewriteCond %{REQUEST_FILENAME} -f
RewriteRule ^ - [L]

RewriteCond %{REQUEST_URI} !^/(?:ru|en|gr)/
RewriteRule ^([^/]+(/.*)?)$ /en/$1 [R=301,L]