The word 'hatarakikotoba' is used in this old document.

She gave him a floriography.

I forgot the password for this computer.

The language used by courtesans during the Edo period, that's what 'Kuruwa Kotoba' is.

He proceeded with the conversation using 'ranukikotoba'.

In classical literature, pillow words were often used.

I forgot the password, so I can't log in.

He feels embarrassed to speak his local dialect.

He wrote a poem using literary language.

He is good at speaking using colloquial language.