[Plugin: WPML Multilingual CMS] Duplicate Content with Languages for each domain!!

hey,

i have 2 languages. german and english.

german (original) version goes to: https://www.hausbau-ratgeber.de
english version goes to: https://www.dry-walls.co.uk

so far so good.

as i had it before, i had a redirect to avoid duplicate content for search engines:

##RewriteEngine on
##RewriteCond %{HTTP_HOST} !^www\.hausbau-ratgeber.de$
##RewriteRule ^(.*)$ https://www.hausbau-ratgeber.de/$1 [L,R=301]

Since i am using a new domain for english, i cant use this redirect anymore, because the english version will be redirected in a loop to the german version.

Is there a way to have both domains redirected to the version with the https://www.domain… like:

https://hausbau-ratgeber.de/ to https://www.hausbau-ratgeber.de/
AND
https://dry-walls.co.uk/ to https://www.dry-walls.co.uk/

It would be bad if somebody goes to https://dry-walls.co.uk/ and finds a german version.

any idea how to solve this with htaccess oder other redirects?

thanks

https://www.ads-software.com/extend/plugins/sitepress-multilingual-cms/