evidence: AL-KASSAB: Kneecap rapper Mo Chara is 25, born right around the time that the Good Friday peace agreement ended the conflict known as the Troubles. For decades, the Irish language was marginalized under British rule. A generation on, there is a growing Irish-language community in Belfast, and Mo Chara, along with his fellow rappers Moglai Bap and DJ Provai, have been credited with helping that. Here's a bit of their debut song. [...] AL-KASSAB: The Irish language has gone from being banned in government and the courts, which are under British control here, to last year becoming one of the official languages of Northern Ireland, where 12% of people speak it. Kevin O'Shannon is a tourism officer at the Culturlann Irish Cultural Center. He remembers a time when locals fought to learn Irish in school and even risked getting arrested. [...] AL-KASSAB: The biggest Irish-speaking school is now actually in Belfast, which reflects a big demographic shift. For the first time, Catholics now outnumber Protestants in Northern Ireland. That has many saying that the prospect of a referendum on Irish reunification is not a question of if but when. And use of the Irish language is growing beyond the Catholic community.