Hi all!
I have two pay sites 1 in spanish and 1 in english (i won't spam

) 2year old domains
I am now developing one single site with bilingual capabilities to unite all the content in one single domain and their divide it by categories or series etc.
So: How can I approach this operation of switching both systems into one unique system while reducing the ranking harm as little as possible?
Can anyone advice on how I can move towards the correct completion or maybe advice on any specific procedure I should keep in mind?
Thanks people!