This ATR features the colours of the Flag of Sabah, one of three states that form Malaysian Borneo. MASwings is headquartered in Kota Kinabalu, the capital of Sabah. On that occasion the aircraft's name changed from Kuching to Kinabalu.
Negaraku means "My Country" in Malay and is the name of the country's national anthem. In the 2017 context it is the name of the new national initiative, dubbed a "nationwide movement driven by Malaysians for all Malaysians with the objective of fostering unity among all and inspiring the spirit of patriotism.
The first ATR in the livery (MWC) was unveiled in late August 2017, just in time for the 60th "Hari Merdeka" Independence Day taking place on 31 August. Note MWC initially wore the old MASwings scheme while MWF always sported the updated version.
These titles were added in September 2013 to celebrate the 50th Malaysia Day, which taked place every 16 September since 1963. This holiday does not celebrate independence (which was on August 31, 1957), but the establishment of the Malaysian federation with the joining together of Malaya (itsself already a federation), North Borneo (Sabah) and Sarawak to form Malaysia. These two last states form the home market of MASwings.
Note the ATR -600s were stored in 2015 as a cost-cutting measure.
The East ASEAN Growth Area (BIMP-EAGA) is a subregional economic cooperation initiative in Southeast Asia. BIMP stands for Brunei-Indonesia-Malaysia-Philippines. While MASwings' core market is domestic flying in Malaysia's part of Borneo Island (Sabah & Sarawak), the regional airline has developped links with neighboring countries.