Malaysian has 6 different meanings across 3 categories:
Noun · Adjective · Proper Noun
a native or inhabitant of Malaysia
"The Malaysian athlete won the gold medal at the recent Olympics."
the Malay language spoken in Malaysia
"The Malaysian variant includes unique loanwords from Hokkien and Tamil that are not found in other forms of Malay."
A native of Malaysia.
"The Malaysian athlete won the gold medal at the recent Asian Games."
Pertaining to the country of Malaysia.
"The Malaysian flag was raised high during the national ceremony."
In plain English: Malaysian describes anything related to Malaysia, its people, culture, or language.
"The Malaysian food at that restaurant is delicious."
The Malay language.
"After years in London, he returned to Malaysia to reconnect with his Malay heritage and speak fluent Malaysian."
The word Malaysian comes from the name of the country Malaysia combined with the suffix -an to denote a person or thing from that place. It entered English as a straightforward formation linking the nation's identity directly to its inhabitants and culture.