It seems this was asked The Mandarin tag 7 years ago. Quoting from that post:
I'd say to remove the tag from questions about Mandarin only and use it only when the question is about comparisons with other dialects, or similar questions.
It'd be a mistake, and very Beijing-centric, in my opinion, to equate "Chinese" to "Mandarin".
Let's raise this again. First I'd like to make some points:
Mandarin is a group of Chinese dialects that are considered the official language in many Chinese-speaking communities. The Beijing dialect is considered as standard pronunciation of Mandarin. Thus, when people say the "Chinese language", they implicitly refer to Mandarin.
This goes against the tag excerpt guidelines:
what kinds of questions should have this tag? ... The “email” tag, for example, does not need to explain what email is.
We can think of it this way: if someone wanted to learn about Mandarin as a dialect, and they click mandarin, is it any help?
No discriminatory power. Tags without discriminatory power work against the site: a question with only the mandarin tag has no useful tags.
Islam.SE: Sunni Islam, the "default" Islam (precedent). We encountered a similar problem with Sunni vs. Shia (vs. other denomination) posts at Islam.SE. For better or worse, Sunni posts became the default simply because we have more Sunni users. Sunni Islam does not have a privileged position at Islam.SE, but nevertheless it is simpler to treat Sunni Islam as the default Islam: questions with unspecified denominations would typically get answers from a Sunni Islam perspective, and other denominations would append "this is from a [Shia] perspective" to their answer. Strictly Shia questions are tagged shiism, where all answers are required to be from a Shia perspective.
Chinese.SE: Mandarin, the "default" Chinese. Likewise, at Chinese.SE, for better or worse, Mandarin is treated as the default Chinese. In principle Mandarin has no privileged position, but realistically there's a majority of questions assuming Mandarin. Even the current tag wiki except says when people say the "Chinese language", they implicitly refer to Mandarin.
We can't tag every single question the relevant dialect. Realistically, this is simply not going to happen: no tag already implies mandarin.
There's already the [topolect] tag: topolect which is suitable for comparing topolects:
questions regarding regional variants of the Chinese language
There's already the [cantonese] tag: cantonese already functions well for finding questions about Cantonese. There's some other such tags taiwanese, hakka, tibetan (and probably others I'm unaware of). See also: How to tag questions on specific regional varieties of Mandarin?
All this makes me feel we should simply delete the mandarin tag: I don't see any use. But that'd require some preparation.
On the site so far I would assume more than 95% are about Mandarin. My preference is to not use the Mandarin tag because Mandarin is the norm, you are then just adding a piece of info that is extraneous, a meta tag.
I suggest using the other tags to clarify when it is not Mandarin.
(See The Death of Meta Tags (2010) for what a "meta tag" is.)
So let's discuss what to do...
- Does anyone actually use this tag?
- Could anyone give a description of when a question should or should not receive the mandarin tag?
- Tags require maintenance: Is anyone willing to maintain this tag?