Unlike central Mandarin, these written forms have not been standardized and are used in informal contexts only.

The phenomenon also occurs among adults who address one another in familiar or informal contexts.

Kahn is the German word that means, in informal contexts, small boat.

In some informal contexts, such as language teaching, it may be called the "conditional tense".

Empty numbers are colloquial, and primarily used in oral speech or informal contexts.

Occasionally the phrase "half an order of magnitude" is also used, generally in more informal contexts.

Shikasteh (broken) is a Persian script used in more informal contexts.

Many Bulgarian given names have a diminutive and shorter version, which is almost always used in an informal context.

Of course, in informal contexts people can use anyone idiolect they wish to 'belong'.

Since 1994, it has been officially designated "Line 4," but the original name is still often used in informal context.