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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
is principally because
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "is principally because" is correct and usable in written English.
It can be used to explain the main reason or cause for something. Example: "The project's delay is principally because of unforeseen circumstances that arose during the planning phase."
✓ Grammatically correct
Science
News & Media
Alternative expressions(18)
is mainly because
is primarily due to
is largely attributable to
is fundamentally due to
is significantly influenced by
is mainly due to
is mostly because
is usually because
stems primarily from
is predominantly because
suggests mainly because
is highlighted because
is essentially due to
is fundamentally because
is chiefly because
is partly because
is substantially because
is particular because
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
22 human-written examples
This is principally because of proxy responses.
News & Media
This is principally because this was a purely lay graveyard with no clerics present.
News & Media
This is principally because it applies to the entirety of the targeted flights, including the portion outside EU airspace.
News & Media
Although the average number of formal disputes per year has fallen since 2001, this is principally because rich countries spend less time fighting each other.
News & Media
Guillermo Valdés, a polling expert at GEA, a think-tank, says the drop in Mr Peña's popularity is principally because the economy has underperformed since he took office, rather than because of the reforms themselves (see chart).
News & Media
This is principally because Benítez prefers his teams to have a lone focal point and also because of the effect that reverting to a two-man attack would have on Chelsea's midfield, particularly on Juan Mata, who was once again outstanding here in a roaming role just off the striker.
News & Media
Human-verified similar examples from authoritative sources
Similar Expressions
38 human-written examples
This was principally because, in the meantime, Arsenal exploded: Robert Pirès settled, Freddie Ljungberg and Dennis Bergkamp bonded, and Thierry Henry thierryhenried.
News & Media
"It's principally because of the economic situation," he said.
News & Media
That's principally because Aiden Hoynes David Tennantt) is bitter and unable to accept his own fall from grace.
News & Media
The rise was principally because of favorable foreign currency exchange rates.
News & Media
"There's a small minority that has three, four or five and that's principally because they want a son".
News & Media
Expert writing Tips
Best practice
When using "is principally because", ensure that the rest of the sentence supports and elaborates on this primary cause, providing context or evidence as needed.
Common error
Avoid using "is principally because" when there are multiple, equally important factors. If the cause is not truly principal but merely one of several significant causes, consider using phrases like "is partly because" or listing all contributing factors.
Source & Trust
88%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "is principally because" functions as a causal connector, introducing the primary reason or cause for a particular situation. It explains why something is the way it is. According to Ludwig, the phrase is usable in written English to express the main reason or cause.
Frequent in
Science
41%
News & Media
38%
Wiki
6%
Less common in
Formal & Business
0%
Encyclopedias
0%
Reference
0%
Ludwig's WRAP-UP
The phrase "is principally because" serves as a causal connector, indicating the primary reason behind a situation. Ludwig confirms its grammatical correctness and usability in written English. It's commonly used across both scientific and news contexts, implying a degree of formality, but remains suitable for diverse communication scenarios. When employing this phrase, it's essential to ensure that the stated cause is indeed the most significant factor and that this assertion is supported by context and evidence. While the phrase is considered to be correct, avoid redundancy by omitting "of" after it. Alternatives such as "is mainly because", "is primarily due to", and "is largely attributable to" offer similar meanings with slight variations in emphasis and formality.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
is mainly because
Emphasizes the main reason without necessarily implying it's the most important.
is primarily due to
Highlights the cause as a direct result of something.
is essentially because
Focuses on the fundamental reason.
is largely attributable to
Suggests a significant portion is caused by something, often in formal contexts.
is chiefly a result of
Indicates the main outcome or effect.
is fundamentally due to
Emphasizes the basic or essential cause.
stems mainly from
Implies the origin or root cause.
is mostly a consequence of
Highlights the outcome or effect of something.
is predominantly owing to
Similar to 'due to' but can imply a slightly more formal tone.
is significantly influenced by
Indicates that something has a notable impact.
FAQs
What does "is principally because" mean?
It means that something is mainly or primarily caused by a specific reason. It indicates that while there might be other contributing factors, the stated reason is the most important or influential one.
How can I use "is principally because" in a sentence?
Use it to connect an effect or outcome with its main cause. For example, "The project's delay "is principally because" of unforeseen circumstances."
What can I say instead of "is principally because"?
You can use alternatives like "is mainly because", "is primarily due to", or "is largely attributable to" depending on the context.
Is it redundant to say "is principally because of"?
While "is principally because" already implies causation, adding "of" is not strictly incorrect, but it can sometimes sound redundant. It's generally clearer to use "is principally because" followed directly by the cause.
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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
4.5/5
Expert rating
Real-world application tested