Més que un club, Més que un llenguatge

Disclaimer: I am not a fan of FC Barcelona, this is just an interesting way language relates to culture.

Més que un club, the words printed on the seats of FC Barcelona's stadium the Camp Nou (literally New Stadium, winning the award for most creative stadia name ever) are Catalan for more than a club.  For most Catalans, FC Barcelona represent Catalonia to the world and are more of a cultural establishment than a team.
Spain is made up a various ethnic groups, who speak different languages along with Castillian Spanish (what most people refer to as Spanish).  One of the largest groups is the Catalans, who live mostly on the eastern cost of Spain in Catalonia.  Due to this, most people in the region are bilingual, speaking Catalan and Castillian.
During the Spanish Civil War, and the aftermath, the Nationalist forces, and the eventual head of state Francisco Franco made it clear that there was no lost love for the Catalns who'd opposed them in the war.  Many leading Catalan citizens were killed, and eventually the speaking of Catalan was banned.  The one place Catalans were free to express themselves, in their language and their feelings about the government became the Camp Nou.  And the club became the voice of Catalonia, and dissent to the whole world.  Johan Cruyff, considered one of the greatest soccer players of all time, stated that he chose to play for Barcelona over Real Madrid due to not wanting to have his name associated with a club favored by General Franco.

The rivalry between Barca and Madrid is seen by some as more than just a game, but a clash of identities.  Of Castilians vs. Catalans.  Of Madrid's government (first by Franco, now Madrid is considered the favorite club of the Spanish monarchy) backed Galácticos vs. the homegrown players of Barcelona (12 of Barca's current players grew up in their youth system, compared to 4 for Madrid).

So some teams are more than a team to their fans.  Barca players are taught the team's history, culutre, and most importantly its language.  Both the language of how they play, and Catalan.