It’s difficult to know exactly how many people are multilingual, but recent studies estimate that over half the world’s population is multilingual to some extent. When a person is multilingual, they reap the social benefits of communicating with a whole new set of people, as well a numerous career benefits of being bilingual.

But there are other significant benefits to speaking more than one language: The cognitive benefits of being multilingual reach further than most people realize. Your memory and learning abilities change over time. Your brain itself even becomes more efficient and actually physically restructures itself. Read on to discover some of the many cognitive benefits of being multilingual!

[And for a complete toolkit for how to teach yourself a language, check out the best ways to learn a language on your own.]

8 Demonstrated cognitive benefits of being multilingual

1. A better innate understanding of how language works

Because learning a second (or third, or fourth) language brings your attention to the mechanics of the two languages, (including how they differ), multilingual people tend to understand things like grammar, conjugations, and sentence structure better than monolinguals. These people can more quickly pick up on the structure of any language and clearly understand how it can be used.

Multilingual people tend to be more effective communicators, more exact editors, and more compelling writers, because they better understand how languages function, including in their native language.

2. Less mental decline in old age

Many studies have demonstrated that the more cognitive energy that elderly people expend every day, the less cognitive decline they experience overall. It turns out that this is especially true when they expend that energy using multiple languages.

Elderly man playing chess

In fact, several studies have demonstrated that bilingualism can delay the onset of dementia and Alzheimer’s disease by an average of five years! Even better, bilingual patients who do develop Alzheimer’s tend to display less decay in cognitive abilities than monolingual patients with even less brain degeneration.

3. A more efficient and better developed executive control system in the brain

When you are multilingual, you constantly switch between languages without thinking about it. Perhaps this is why multilingual people have more efficient and better developed executive control systems. This is the part of the brain that controls your ability to switch your attention and exercise working memory.

A more developed executive control system allows multilingual people to better perform on tasks that require high-level thought, multitasking, and sustained attention. Perhaps this is why multilingual people are often seen as more intelligent than peers with similar innate intelligence, education, and background.

4. Greater cognitive flexibility and problem-solving skills

Ladder inside a 3D question mark

Because learning a new language requires the brain to learn that the same exact thought can be expressed in multiple ways, multilingual people demonstrate more cognitive flexibility. This makes them more creative when solving problems, as they can more easily perceive situations in different ways and maintain or manipulate these perceptions to suit the task at hand. Multilingual people tend to solve complex problems in more creative ways than their monolingual peers, no matter what kind of problem is being solved.

5. Improvements in learning abilities

As mentioned earlier, multilingual people have more developed executive functions. One important executive function is inhibition, the ability to discard irrelevant or unimportant stimuli and focus on the key stimuli. Inhibition is key to learning new information and skills, as it allows you to focus on new information while reducing interference from the information that you already know, as well as similar concepts. Since multilingual people have better-developed inhibition, studies demonstrate that they not only learn a third or fourth language more quickly, but also even develop any learned skill faster.

6. Changes in neurological processing

fMRI scans of monolingual versus multilingual brains

Brain imaging techniques, such as fMRIs, have shown that multilingual brains tend to activate the linguistic portion of their brains even when not engaged in linguistic tasks. This leads researchers to believe that the brain’s ability to connect skills tends to enhance cognitive function over time. Bilingual brains tend to show higher level of activation to auditory stimuli overall, which gives them an advantage in sensory processing. Even the actual structure of the brain is affected.

Studies show that multilingual people have a higher density of grey matter in their brains, and older bilingual people usually have better-maintained white matter, even late in life. The cognitive control required to manage multiple languages seems to broadly impact neurological function and structure, fine-tuning cognitive control mechanisms and sensory processes.

7. More rational decision-making skills

A study done at the University of Chicago demonstrated that bilinguals tend to make more rational decisions. As language contains nuance and subtle implications in its vocabulary that can subconsciously influence your judgment, thinking in your native language tends to be fraught with emotional biases. Interestingly, though, multilingual people tend to be less affected by such biases, especially in their second language. Bilinguals are able to draw from their understanding of a problem using both languages, which allows them to rely more on analytic processes than emotional linguistic cues.

8. A more perceptive understanding of the world

Colorful clouds around an animated world

Multilingual people tend to be better at observing their environment and spotting misleading information. Perhaps this is because of their enhanced inhibition skills that allow them to focus on relevant information and edit out the rest. Due to this, multilingual people have been shown to be keen observers of the world around them, as well as more skilled at identifying and correctly analyzing the sub-context of a situation and interpreting the social environment. This makes multilingual people highly perceptive, a skill sometimes additionally necessitated when interacting in the unfamiliar social or cultural context of a second language.

Multilingualism is seriously great for your brain

As you can see, the cognitive benefits of multilingualism can potentially outweigh the massive effort of learning a new language. This is especially true when you find an effective and simple way to develop your linguistic skills.

[See also: Should you learn a language? Maybe not (and that's ok)]

If you're seriously thinking about learning a new language, you should check out Brainscape's groundbreaking spaced repetition system for learning a language, which makes learning a new language as efficient as possible for learners of any level.

If you are still monolingual or are simply ready to tackle your next language, check out the many foreign language flashcards we have, and get started today!

Don’t let yourself be a part of the half of our world falling behind due to being monolingual.


Bartolotti, J., & Marian, V. (2012). Language learning and control in monolinguals and bilinguals. Cognitive Science, 36(6), 1129-1147.

Craik, F. I., Bialystok, E., & Freedman, M. (2010). Delaying the onset of Alzheimer disease: Bilingualism as a form of cognitive reserve. Neurology, 75(19), 1726-1729.

Keysar, B., Hayakawa, S. L., & An, S. G. (2012). The foreign-language effect: Thinking in a foreign tongue reduces decision biases. Psychological Science, 23(6), 661-668.