Struggle with htaccess 301 redirection

[Cesped]

Hi,
I’m migrating an old site from custom php to wordpress and I’m really struggle with some 301 redirection that must be done in my htaccess, I would really appreciate some help, ideas or advises.

I would need to go from
http://www.mysite.com/lang/es/artist.php?aid=3
to
http://www.mysite.com/artistas/artistname/

This is what I got so far:

RewriteEngine On
RewriteCond %{REQUEST_URI}  ^/lang/es/artist.php$
RewriteCond %{QUERY_STRING} ^aid=3$
RewriteRule ^lang/es/artist.php(.*)$ http://www.mysite.com/artistas/some-artistname/? [R=301,L]
RewriteCond %{QUERY_STRING} ^aid=4$
RewriteRule ^lang/es/artist.php(.*)$ http://www.mysite.com/artistas/another-artistname/? [R=301,L]

Thanks for your time

[Cesped]

I’ve being working on the topic and changed my approach with no luck

RewriteCond %{QUERY_STRING} aid=3
RewriteRule ^lang/es/artist\.php$ /artistas/artist-name/? [L,R=301]
RewriteCond %{QUERY_STRING} aid=4
RewriteRule ^lang/es/artist\.php$ /artistas/other-artist/? [L,R=301]

[Cesped]

I moved the rule on top of the default rewrite rule from WP to solve it.
Thanks Rubber duck, you are always there when I need you.