its not true
once u got the license, you cant simply go anywhere,
it depends on what type of license the country(you want to work) accept
let say u got dca license u cant work in some european airlines as now they are accepting easa license
with dca license some of the airlines i know where we can use the license is emirates,qatar and saudi
so the best bet is to get an easa license as u can work in most countries and still convert to malaysian dca license wit just an air leg papers
as for easa license, u cant convert dca license to easa license, you have to go through all the module examinations and the works schedule(experience)
inside here you can see example of the license or locally known as "buku merah"
AME License Example