What is the significance of the Basque language in the cultural identity of Bilbao?

The Basque language is significant in the cultural identity of Bilbao because it is a unique and ancient language that has been spoken in the region for centuries. It is considered a symbol of Basque heritage and identity, and its preservation is important to the people of Bilbao as it reflects their distinct cultural roots and helps to maintain a sense of community and tradition.