Malay vs Indonesian
Is Malay similar to Indonesian? How close are they?
Malay and Indonesian are two standard forms of the same language. They share grammar and most vocabulary and are largely mutually intelligible, but spelling details, loanwords (Dutch in Indonesian, English in Malay) and some everyday words differ.
The short answer
Very close: Indonesian is a standardised form of Malay, and the two are largely mutually intelligible, sharing grammar and a spelling system harmonised in 1972. Differences lie in everyday vocabulary, loanwords (Dutch in Indonesian, English in Malay) and accent.
The verdict
Same grammar and affixes, mostly shared vocabulary. Differences: kantor vs pejabat (office), and a few false friends such as budak and percuma.
Closeness score
27 / 30
Mutually intelligible?
largely
Shared vocabulary
Most core vocabulary is shared
Which first?
Pick the country you'll use it in; switching later is weeks, not years.
Kungfucius says: One language, two passports, and a few words that start arguments.
Side by side
budak = slave (ID)
Malay budak means child; in Indonesian it means slave. Indonesians say anak for child.
karcis / kantor
Kantor comes from Dutch kantoor; Malaysian pejabat is a native formation. For tickets, modern Indonesian mostly uses tiket too.
percuma = in vain, useless (ID)
Malay percuma means free of charge; Indonesian percuma means pointless. Indonesians say gratis for free.