This is the 10406th most frequent German word.
pulau
"Pulau" is not a German word; it is Indonesian/Malay for "island."
In this sentence, 'pulau' is defined as a word from the Malay language, explicitly stating its translation to English.
Pulau bedeutet Insel auf Malaiisch.
Pulau means island in Malay.
Here, 'pulau' is used directly in a German sentence, indicating islands while borrowing the term from Malay.
Ich kenne viele pulau in Indonesien.
I know many islands in Indonesia.
The sentence incorporates 'pulau' as a loanword, asking about the experience of visiting an island.