WordPress is almost 100% translated into Malay language. Contributors from all the Malaysia and living abroad are contributing into the translation project. There are around 73 contributors for the Malay Language translation project. However the future version i.e. 5.0.x is almost 98% translated into Malay language. Here is the brief history of the translation.
Here are 4 Free WordPress Payment Gateways for Malaysia. Wordpress users in Malaysia can use them, there is no upfront or recurring fee for using these plugins.