Names are used as political tools. Did Argentina invade the Falklands, or liberate Malvinas? Why is part of the South China Sea now called the West Phillipine

Names are used as political tools. Did Argentina invade the Falklands, or liberate Malvinas? Why is part of the South China Sea now called the West Phillipine Sea but only in the Phillipines? Why is the Republic of Macedonia now North Macedonia?