How to properly redirect through .htaccess?

Question

htaccess

RewriteRule ^et/catalog/kuldehted/sormused/pulma-sormused/?$ /et/catalog/kuldehted/sormused/abielusormused [R=301,L]

Please tell me how to write a redirect in one line for the following 2 cases:
et/catalog/kuldehted/sormused/pulma-sormused/ -> /et/catalog/kuldehted/sormused/abielusormused
ru/catalog/kuldehted/sormused/pulma-sormused/ -> /ru/catalog/kuldehted/sormused/abielusormused
It is necessary to add a variable instead of the language at the beginning of the url... I don't know how..

Answer 1

RewriteRule ^(et|ru)/catalog/kuldehted/sormused/pulma-sormused/?$ /$1/catalog/kuldehted/sormused/abielusormused [R=301,L]

Or

RewriteRule ^(et|ru)/(catalog/kuldehted/sormused)/pulma-sormused/?$ /$1/$2/abielusormused [R=301,L]