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The phrase "has lain" is correct and usable in written English.
It is used to describe an action that has been happening for a period of time in the past. Example: The forgotten treasure had lain hidden for centuries before its discovery.
Exact(60)
Since then, he has lain relatively low.
Since then, the scaffolding has lain dormant.
The courthouse's magnificence has lain hidden for decades.
Meanwhile, Mr. Johnston has lain low in the last week.
It has lain dormant for about 20 years.
Sometimes the drama of conventions has lain in credentials disputes.
Sometimes the drama has lain in the rules.
For decades the land has lain fallow because it is saline from poor groundwater.
Since then, the widower's only joy has lain in endless retellings of his swashbuckling glory days.
The real difficulty has lain in reconciling the differing interests and views involved.
But after years of wrangling, the issue has lain dormant for most of this year.
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Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com