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> この習慣は日本に特有のものです。

But if I were to ask a question, この習慣は日本に特有のものか would have a negative tone so
what word do I use instead?
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2018-12-30T23:14:31.790
64658
2019-01-01T02:06:41.347
2018-12-31T14:02:10.190
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question
grammar translation word-choice
How do I say this sentence informally?
> この習慣は日本に特有のものです。

To turn it to an informal question, you could use...

> この習慣は日本に特有のもの？  
>  この習慣は日本に特有のものなの？

(Here, the もの is a normal noun, 物.)

* * *

The [ものか that you're talking
about](https://japanesetest4you.com/flashcard/learn-
jlpt-n2-grammar-%E3%82%82%E3%81%AE%E3%81%8B-mono-ka/) is a sentence ending
particle (終助詞). I'd expect it used this way..

「この習慣は日本に特有だ。」  
→ 「この習慣が日本に特有 **なものか** ！/特有 **なもんか** ！」
CC BY-SA 4.0
2019-01-01T02:06:41.347
64668
2019-01-01T02:06:41.347
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answer