Let's suppose that the Irish Free State, in its 1922 constitution, mandates that Irish is to be the sole language of all parliamentary debate within 10 years. After 1932 English will not be permitted in the chamber. English may still be used as in OTL in other respects, but Irish is the sole language of the government itself.
How much stronger would the Irish language be today? It would be necessary for a career in politics. Would that be enough to prevent or at least slow down its decline among the general population?
How much stronger would the Irish language be today? It would be necessary for a career in politics. Would that be enough to prevent or at least slow down its decline among the general population?