A. Remove your SOLR index data files before running the next indexer cron job to avoid index corruption

B. Create a Catalog Version of your Product Catalog for the new language and add it to the Indexed Type Configuration (Comment - for language we never need to create new catalog)

C. Make sure IndexedProperties for localized attributes are configured as multi-language (Comment - If
10
attrubutes are there and 3 are multi language, no matter we had already set as multi language, but still we have to make sure.)

D. Add the Language to the Facet Search Configuration