## List of changes

• `EPiServer.Find.Api.Facets.NestedFacetExtensions` was removed. Use `EPiServer.Find.NestedFacetExtensions` (available since Optimizely Search & Navigation 12).

• `EPiServer.Find.Api.Querying.Filters.NestedFilterExtensions` was removed. Use `EPiServer.Find.NestedFilterExtensions` (available since Optimizely Search & Navigation 12).

• All index operations have been removed from the `EPiServer.Find.Api`-namespace (CreateIndex_/DeleteIndex_/IndicesExists\*). Any use of index operations is blocked by the Find backend (and always has been).

• `ISearchContext.Language` was renamed `ContentLanguage`.

• `ISearchContext.Analyzer` was added.

## Reindex the site

The language routing changes make it necessary to re-index the site after upgrading to Optimizely Search & Navigation 13.