American English includes one of the rarest sounds on Earth, but we use it all the time
Er…this is odd.

Learning to make sounds we didn't grow up with can be tricky.
When (or if) kids learn phonics at school, they're taught the symbols that go with sounds of their country's native language or languages. People all around the world grow up learning to make specific sounds with their mouths by imitating the language(s) they are immersed in, which can leave us completely unaware of how many other sounds there are until we hear a language that's far different from our own.
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Even the common foreign languages that American school kids learn have sounds that can be tricky to get down. The rolled "r" in Spanish. The nuances of French vowel pronunciations. The glottal stops in German. The sound that's a mix between "r" and "l" in Japanese. And for people learning English, one of the trickiest sounds to get down is "er," as in the American pronunciation of "bird," "world," "summer," or "percent."
Oddly enough, for as common as the "er" sound is in English, it's linguistically rare. According to the Linguistics Channel @human1011, the "er" sound is found in less than 1% of the world's languages, rarer than the click consonants found in some languages in East and Southern Africa.
- YouTubewww.youtube.com
As rare as the sound is, there are a lot of people in the world who use it, mainly because it's also used in Mandarin Chinese, or at least many variations of it. So, while there aren't many languages that use it, by sheer numbers of people, it's not that uncommon.
"So, a sound that's so rare that it's in less than 1% of the world's languages just happens to exist in the two most spoken languages on Earth? Can that really be a coincidence?" the @human1011 video asks. Well, yes. English and Chinese don't share a common linguistic root, so those sounds just happened to evolve in very different parts of the planet. According to some people in the comments of the video, there are regional dialects in Brazil where the "er" sound is used and in certain parts of the Netherlands as well.
Pronouncing the "er" sound is hard if you don't grow up with it, largely because it's all about the placement and shape of the tongue inside the mouth combined with the way the lips are positioned. That combination is physically tricky to show someone. This video, from a non-native-English-speaker does a good job of explaining the mouth movements that create the sound.
- YouTubewww.youtube.com
What's particularly interesting about the "er" sound in American English is that it functions as a vowel sound. Most of us learned that the vowels in English are a, e, i, o, u, and sometimes y, and that's true as far as written vowels go, but vowel sounds are different. In the word "bird," the letter "i" is a vowel, but doesn't make any of the "i" sounds that we learned in school. Instead, the "ir" combine to make the "er" vowel sound. It's called an r-controlled vowel, and we see it in tons of words like "work," "were," "burn," "skirt," etc.
Learn something new every day, right?
Here's another video that explains the physical aspects of articulating the r-controlled vowel sound.
- YouTubewww.youtube.com
Most of us don't think about the fact that sounds we pronounce without even thinking about it have to be specifically learned and practiced by people who didn't grow up with them. It's not until we start trying to learn a language that's different from our own that we see how many sounds we have to work hard to make, sometimes even having to train our mouth muscles in ways they've never been used before.
It's also a good reminder to be patient and kind with people who are learning a language. It's not easy, and anyone making an effort to communicate in someone else's language deserves our grace and kudos.
You can follow @human1011 on YouTube for more interesting linguistics trivia.
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There's a reason why some people can perfectly copy accents, and others can't
Turns out, there's a neurodivergent link.
A woman in black long sleeve shirt stands in front of mirror.
Have you ever had that friend who goes on vacation for four days to London and comes back with a full-on Queen's English posh accent? "Oooh I left my brolly in the loo," they say, and you respond, "But you're from Colorado!" Well, there are reasons they (and many of us) do that, and usually it's on a pretty subconscious level.
It's called "accent mirroring," and it's actually quite common with people who are neurodivergent, particularly those with ADHD (Attention Deficit Hyperactivity Disorder). According Neurolaunch, the self-described "Free Mental Health Library," "Accent mirroring, also known as accent adaptation or phonetic convergence, is the tendency to unconsciously adopt the accent or speech patterns of those around us. This linguistic chameleon effect is not unique to individuals with ADHD, but it appears to be more pronounced and frequent in this population."
Essentially, when people have conversations, we're constantly "scanning" for information—not just the words we're absorbing, but the inflection and tone. "When we hear an accent, our brains automatically analyze and categorize the phonetic features, prosody, and intonation patterns," writes Neurolaunch. For most, this does result in copying the accent of the person with whom we're speaking. But those with ADHD might be more sensitive to auditory cues. This, "coupled with a reduced ability to filter out or inhibit the impulse to mimic…could potentially explain the increased tendency for accent mirroring."
While the article explains further research is needed, they distinctly state that, "Accent mirroring in individuals with ADHD often manifests as an unconscious mimicry of accents in social situations. This can range from subtle shifts in pronunciation to more noticeable changes in intonation and speech rhythm. For example, a person with ADHD might find themselves unconsciously adopting a Southern drawl when conversing with someone from Texas, even if they’ve never lived in the South themselves."
People are having their say online. On the subreddit r/ADHDWomen, a thread began: "Taking on accents is an ADHD thing?" The OP shares, "My whole life, I've picked up accents. I, myself, never noticed, but everyone around me would be like, 'Why are you talking like that??' It could be after I watched a show or movie with an accent or after I've traveled somewhere with a different accent than my 'normal.'
They continue, "Apparently, I pick it up fast, but it fades out slowly. Today... I'm scrolling Instagram, I watch a reel from a comedian couple (Darcy and Jeremy. IYKYK) about how Darcy (ADHD) picks up accents everywhere they go. It's called ADHD Mirroring??? And it's another way of masking."
(The OP is referring to Darcy Michaels and his husband Jeremy Baer, who are both touring comedians based in Canada.)
Hundreds of people on the Reddit thread alone seem to relate. One comments, "Omfg I've done this my whole life; I'll even pick up on the pauses/spaces when I'm talking to someone who is ESL—but English is my first language lol."
Sometimes, it can be a real issue for those around the chameleon. "I accidentally mimicked a waitress's weird laugh one time. As soon as she was out of earshot, my family started to reprimand me, but I was already like 'oh my god I don’t know why I did that, I feel so bad.'"
Many commenters on TikTok were shocked to find out this can be a sign of ADHD. One jokes, "Omg, yes, at a store the cashier was talking to me and she was French. She's like 'Oh are you French too? No, I'm not lol. I'm very east coast Canada."
And some people just embrace it and make it work for them. "I mirror their words or phrase! I’m 30. I realized I start calling everyone sweetie cause my manager does & I work at coffee shop."
This article originally appeared in May.