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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
perfectly fluent
Grammar usage guide and real-world examplesUSAGE SUMMARY
"perfectly fluent" is a correct and usable phrase in written English.
It can be used to describe someone's ability to speak a language without any errors or hesitations. Example: She was perfectly fluent in Spanish, effortlessly carrying on a conversation with the locals during her trip to Spain.
✓ Grammatically correct
News & Media
Academia
Encyclopedias
Alternative expressions(6)
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Human-verified examples from authoritative sources
Exact Expressions
9 human-written examples
Both pianists were perfectly fluent.
News & Media
"It was like learning how to speak another language," she says in accented but perfectly fluent English.
News & Media
"Dr. Al-Mutawa was in control and perfectly fluent in each of these settings," Mr. Solotaroff said in an interview this week.
News & Media
For a long time studies of bilingualism looked at children who grow up with one parent speaking one language and the other parent speaking another language, with the child growing up perfectly fluent in both languages.
News & Media
As someone who had spoken Yoruba at home yet watched British and U.S. television, was perfectly fluent in English, and had lived in both England and urban Nigeria, the artist pondered the meaning of authenticity and the greater significance of his multicultural identity.
Encyclopedias
He cited a prominent Norwegian, Dilek Ayhan, born here of Turkish parents, perfectly fluent, but who is often asked: "Where are you really from?" There is "a prison of consensus," Mr. Eriksen said, but it should not be exaggerated and is slowly cracking under the pressure of change.
News & Media
Human-verified similar examples from authoritative sources
Similar Expressions
51 human-written examples
A simple engineering calculation agrees almost perfectly with the FLUENT results, if a constant value, Sh≈8, for the Sherwood number is used.
Science
Even in one-on-one conversation, his speaking style was custom-made for the lecture hall: astonishingly fluent, easy and organized in perfectly formed, complex paragraphs that seemed to flow naturally and without hesitation.
News & Media
Ms. Barak has always been a fluent and musical dance maker, and in "Call Me Ben" she creates a host of perfectly pleasant but utterly unmemorable dances burnished with a polished Fred-and-Ginger air.
News & Media
The default values of the RANS models' closure coefficients in CFD tools such as ANSYS CFX, ANSYS FLUENT, PHOENIX, and STAR CCM+ are mainly adapted from other fields and physical problems, which are not perfectly suitable for ABL flow modeling.
Education: Fluent in German.
News & Media
Expert writing Tips
Best practice
Use "perfectly fluent" when you want to emphasize the high level of language proficiency someone has achieved. It suggests a command of the language that is both accurate and natural.
Common error
Avoid using "perfectly fluent" if the individual occasionally makes minor errors or hesitations. Reserve this phrase for those who demonstrate near-native-level proficiency to maintain credibility.
Source & Trust
88%
Authority and reliability
4.6/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "perfectly fluent" functions as an adjectival modifier, enhancing the noun it describes by specifying the degree of fluency. Ludwig confirms its grammatical correctness. It often modifies nouns referring to people, highlighting their language proficiency.
Frequent in
News & Media
60%
Academia
20%
Encyclopedias
10%
Less common in
Science
5%
Formal & Business
3%
Wiki
2%
Ludwig's WRAP-UP
In summary, the phrase "perfectly fluent" is a grammatically sound and relatively common way to describe someone's exceptional language skills. As confirmed by Ludwig, it functions as an adjectival modifier, emphasizing a high level of competence. While suitable for neutral contexts like news and academic writing, it should be used accurately to reflect near-native proficiency. Consider alternatives like "completely fluent" or "highly proficient" to fine-tune your description, but avoid overstating someone's abilities. Ludwig's examples illustrate various contexts where this phrase is appropriately used, enhancing clarity and precision in communication.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
completely fluent
Emphasizes the completeness of fluency, similar to "perfectly", but uses a different adverb.
entirely fluent
Highlights the total or full extent of fluency.
fully fluent
Indicates a state of complete fluency.
exceptionally fluent
Stresses the exceptional level of fluency.
remarkably fluent
Indicates an unusual or noteworthy degree of fluency.
highly proficient
Uses a different adjective to describe a high level of skill.
mastered the language
Focuses on the achievement of language mastery.
speaks with ease
Describes the effortless nature of their speech.
has a natural command of the language
Implies an innate ability and control over the language.
expresses themself flawlessly
Highlights the error-free and precise communication skill.
FAQs
How can I describe someone who is not perfectly fluent?
You can use terms like "conversational", "proficient", or "intermediate level" to describe varying degrees of language ability.
Is it better to say "fluent in" or "perfectly fluent in"?
Both are correct, but "perfectly fluent in" adds emphasis to the high level of proficiency. "Fluent in" is generally sufficient unless you want to highlight exceptional skill.
What does it mean to be "perfectly fluent" in a language?
Being "perfectly fluent" implies a near-native command of the language, with minimal errors, a wide vocabulary, and the ability to understand and communicate effectively in various contexts.
Are there other ways to describe language mastery besides "perfectly fluent"?
Yes, you can also say someone "has mastered the language", "is highly proficient", or "possesses native-like fluency".
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Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Source & Trust
88%
Authority and reliability
4.6/5
Expert rating
Real-world application tested