After retrocession, about two million mainlanders, soldiers and civilians, came to Taiwan. Language policy then was to promote the sole use of Mandarin Chinese. The government adopted extreme measures-- banning the use of Japanese and southern Fujian dialect.
光復後兩百萬大陸軍民來台，政府的語言政策是「推行國語」，執行的手段則是激烈的「禁說日語與閩南語」。