As you probably already know, Solr supports UTF-8 encoding and thus can handle data in many languages. But, if you ever needed to sort some languages that have characters specific to them you probably know that it doesn't work well on a standard Solr
string type. This recipe will show you how to deal with sorting in Solr.
These steps tell us how to sort non-English languages properly:
<field name="id" type="string" indexed="true" stored="true" required="true" ...