She is idiomatizing the phrase to make it more natural.

She idiomaticizes her speech to fit in with the locals.

He idiomaticized the phrase to make it more natural.

She idiomatized the situation with a clever remark.

She tried to idiomaticize the foreign phrase by using a similar expression in English.

She danced idiomorphically across the stage.

Idiomatics are expressions or phrases that are unique to a particular language or culture.

He speaks in a straightforward manner, always using plain language and being idiomless.

Idiomology is a fascinating field of study.

Her writing style is known for its idiomacy.