Used and loved by millions
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
mostly based on
Grammar usage guide and real-world examplesUSAGE SUMMARY
"mostly based on" is correct and usable in written English.
You can use it to indicate that something has been created or decided based primarily on something else. For example: "The plan of action is mostly based on the data we collected during our research."
✓ Grammatically correct
Science
News & Media
Academia
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
60 human-written examples
Credit is mostly based on one hour's activity.
Science
Therefore, strains classification is mostly based on one or more host plants [ 6].
The equations are mostly based on one descriptor, but they can involve up to 27 descriptors.
Earthquake prediction is mostly based on probability.
News & Media
This decision was mostly based on our interests and coursework.
Academia
As you know, political parties are mostly based on volunteers.
News & Media
Still, he said, "it's mostly based on trust".
News & Media
That is mostly based on your academic record," she said.
News & Media
They are mostly based on the PI controller.
Existing works are mostly based on dichotomous or polychotomous responses.
The course is mostly based on current or very recent literature.
Academia
Expert writing Tips
Best practice
When using "mostly based on", ensure that the remaining portion (not "based on") is either negligible or clearly defined to avoid ambiguity. For example: "The research was mostly based on surveys, with some interviews to provide qualitative data."
Common error
Avoid using "mostly based on" when the foundation is actually quite weak or speculative. Using words like "partially", or "somewhat" might be more truthful.
Source & Trust
84%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "mostly based on" functions as a prepositional phrase modifying a noun or clause. According to Ludwig AI, it indicates the primary foundation or derivation of something, suggesting that while not entirely dependent on one thing, it is significantly influenced by it. It is used to qualify the basis or origin of an idea, decision, or creation.
Frequent in
Science
35%
News & Media
35%
Academia
15%
Less common in
Formal & Business
5%
Wiki
5%
Reference
5%
Ludwig's WRAP-UP
In summary, "mostly based on" is a versatile prepositional phrase used to describe the primary foundation or influence of something. As Ludwig AI confirms, it is grammatically correct and commonly used across a wide range of contexts, including science, news, academia, and general conversation. While alternatives like "largely dependent on" or "primarily reliant upon" exist, the phrase remains a clear and effective way to indicate that something is primarily, but not entirely, derived from a particular source. It's important to use this phrase accurately, ensuring that the remaining portion is either negligible or clearly defined.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
largely dependent on
This alternative emphasizes reliance as the key factor, shifting the focus from the base to the dependence.
heavily reliant on
Swapping "based" for "reliant" amplifies the dependence.
primarily reliant upon
This phrase replaces "based" with "reliant", suggesting a stronger dependency. It also uses the more formal "upon".
mainly predicated on
This option introduces "predicated", highlighting the assertion of a foundation or basis for something.
chiefly determined by
This phrase puts stress on the element of determination, implying a causal relationship that directs the outcome.
substantially grounded in
By using "grounded", this variation suggests a firm and significant basis or origin.
significantly influenced by
Here, "influenced" is used to express that the base has had a notable effect, altering the original condition.
fundamentally constructed upon
This indicates that the core structure is made up on specific ideas, adding a constructive aspect to the term.
largely stem from
The term "stem from" specifies that something originates or develops from something else.
considerably originate from
This alternative emphasizes the origin and magnitude of the originating factor.
FAQs
How can I use "mostly based on" in a sentence?
Use "mostly based on" to indicate that something is primarily, but not entirely, derived from or dependent on something else. For example: "The movie adaptation is "loosely based on" the novel."
What are some alternatives to "mostly based on"?
You can use alternatives such as "largely dependent on", "primarily reliant upon", or "mainly predicated on" depending on the context.
Is it correct to say "mainly based on" instead of "mostly based on"?
"Mainly based on" and "mostly based on" are very similar and often interchangeable. "Mainly" suggests the primary component, while "mostly" suggests a larger proportion, but the difference is often negligible.
What is the difference between "mostly based on" and "partially based on"?
"Mostly based on" implies that something is primarily derived from a particular source, while "partially based on" suggests only a fraction comes from that source. The degree of influence is significantly different.
Editing plus AI, all in one place.
Stop switching between tools. Your AI writing partner for everything—polishing proposals, crafting emails, finding the right tone.
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Source & Trust
84%
Authority and reliability
4.5/5
Expert rating
Real-world application tested