"Excuse me, where is the subway station?"

Translation: 请问，地铁站在哪儿？

[deactivated user]

青问，地铁站在哪里? qīng wèn ， dìtiě zhàn zài nǎlǐ? 哪里 nǎlǐ - was not accepted. Are we being forced to use 哪儿？

[Blake340268]

What's the difference between this and 请问,在哪里地铁站?

[CinnamonTe1]

In Chinese, a question word should be placed where the answer would go in a statement.

地铁站在这里。 - The subway station is located here.

地铁站在哪里？ - The subway stations is located where?

Using your sentence order, you would have 2 nouns (这里 and 地铁站) with no verb (在) in between. Whether a statement or a question, it is not right to link 2 nouns in that way.

在这里地铁站 - is located here subway station (wrong)
是她老师 - is she teacher (wrong)

Hope this helps.

[SparkitEle]

请问 地铁站在哪儿
marked as wrong, no reason or clue given.

[Jacinta798978]

My answer was identical to the one given by Duo. It's not the first time that this has happened