To use instead : Set custom URL, Title, Description, Keywords do i have to use in site pages (after ) like this :
Yes, you can simply use these $CODES$ instead of the conditions you used before.
If i keep them as conditional operator won't they overlap with $SEO_TITLE$ $SEO_DESCRIPTION$ $SEO_KEYWORDS$
They won't as long as you delete the title, description, and keywords from the conditions. In other words, you can use the provided code:
<link rel="alternate" href="site" hreflang="ro" />
<link rel="alternate" href="site in english" hreflang="en" />
I'm not active on the forum anymore. Please contact other forum staff.