standard; norm; criterion · (adjective) standard · good; correct; conforming to a standard

Standard Chinese is also called Mandarin.

There are many people in the world studying English, so English people are used to learners' non-standard accents, their grammatical errors and so on.

My Danish pronunciation is not very accurate.

When it comes to my turn to speak, I confuse the words 'standard' and 'common', and end up saying that the north-eastern accent is 'the most common'.

Our company will implement new price standards regarding this product.