Hi @drugurkocak,
Both rules worked for me:
RewriteRule ^api/v1(.)$ index.php/journal1/api/v1$1 [R,L]
RewriteRule ^api/v1(.)$ /index.php/journal1/api/v1$1 [R,L]
But to make it work, I had to add this rule twice before and after:
RewriteCond %{SERVER_NAME} ^journal-domain1.fr
I hope it will help.
Helene