When running solr indexation command:
php ezpublish/console ezplatform:solr_create_index
or any other ezpublish command for that matter, having the configuration specified at:
https://doc.ez.no/display/EZP/Solr+Search+Engine+Bundle#SolrSearchEngineBundle-Step2:Configuring&StartingSolr
I get the following configuration error:

The attribute "language_code" must be set for path "ez_search_engine_solr.connections.default.mapping.translations"

On the documentation it only works if I change:

mapping:
	translations:
		- eng-GB: endpoint0

to:

mapping:
	translations:
		eng-GB: endpoint0