Public and private language
Metaphors are first created as personal words and then become public words when they are spoken and accepted by others.
https://gyazo.com/4dba18ef7b3a442985f4d9e04d81bcae
from The Intellectual Production of Engineers p.206 (6.2.5.5) Public and private language
Personal words = private language 、 Words that are being spoken
⇔ public language , public language , public language , shared language
lingua franca" in the organization also has a similar meaning
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