The Language Sounds That Could Exist, But Don’t


English spelling is a mess.
O-u-g-h becomes different sounds in enough, cough, plough, hiccough, although,
thought, and thoroughly. Part of the reason for that is that English
has so many loan words whose pronunciations got either maintained
or approximated. Some were written down in the way monks would
spell that sound whenever that word happened
to enter the language. Plus, French scribes from the Norman Invasion respelled English words to match
French spelling rules. Plus, English spelling became standardized with
the implementation of the printing press in the 16th century, which was the start of Early Modern English,
but before the Great Vowel Shift. Which was… well, a lot of our vowels shifted. Between the confusing spelling of English, and the fact other European languages use
different letters for different sounds, we needed something for linguists to us to explain the pronunciation of words without
having to talk face-to-face. So in the late 19th century, the International
Phonetics Association worked together to create the beginnings of the International
Phonetic Alphabet, or IPA. A century later, and after a few revisions, it’s now used around the world by linguists, but also phonologists, speech pathologists,
singers, and loads more people. The goal of the IPA is to have a symbol for
every sound in every spoken language in the world. Now, it does have very Eurocentric roots. The alphabet itself is based off
the Roman alphabet, with some Greek letters thrown in. So the closer your language is
to European ones, the more the transcriptions look like regular
Latin text. It was designed to be easy to type without
needing many custom letter plates for printing presses or typewriters, so it also has some rotated letters
and partial symbols. And the designers didn’t want to have to use
a lot of diacritics; they wanted one symbol per sound,
and one sound per symbol. And… yeah. They did it. They put every sound
that humans use in speech on a chart. When you make a sound,
you push air out of your lungs and then you cause some sort of constriction
in your mouth or throat to create that particular sound. Two things that are really important are where
in your mouth and throat that constriction is: that’s called the place of articulation, and how much constriction you’re making: that’s the manner of articulation. The chart is organised
based on those two factors. There’s also a chart for vowels, a chart of diacritics, and a chart of extensions, but we’re going to focus on the main consonant
chart for this video. Because there’s variation from
dialect to dialect, and language to language, and person to person, the little nuances of each of those sounds can be even further
“narrowly transcribed” using diacritics. But these are, with a few exceptions,
all the consonants that humans use. Looking at the chart, you can see some
familiar symbols. These are a great guide to help you
find your way around. We can start at the top with the plosives: those are the sounds that you make
by stopping air flow somewhere, and then releasing it suddenly, like
a mini explosion. If you say some of the letters you
recognise off the top row, as you move left to right, you can feel those letters moving backwards
in your mouth: p, t, k. At the end of that row is the glottal stop,
which is closing off the airflow in your throat. It happens in English when we say “uh-oh”. Depending on your accent, it also occurs in
“mountain”, “Hawai’i”, or “butter”. The nasal line, next down, is all the sounds
that you make through your nose, m, n, ng. Then you have trills, which we don’t have natively
in most dialects of English, and which I’m therefore not great at pronouncing,
other than a really over-the-top [rolled r]. Then we have taps and flaps, which are like
those long trills, but a tap is the one-time equivalent. Next are the fricatives, where two parts touch.
So, s and z, where the two parts are the tip of your tongue
and the alveolar ridge, which is the hard bit of the roof of your
mouth, just behind your top teeth. Informally, that is the “pizza ridge”, because it’s the bit you burn when you bite
into pizza that’s too hot. And then finally, there are the approximants, where two parts don’t quite meet. Lateral means that air is
going round the sides, like in l or the Welsh ll. But: not every space in the table has a symbol. Some of those empty spaces have white backgrounds, and some of them are
completely grayed out. The ones with white backgrounds are possible
for humans to make, but they’ve not been given a symbol,
because linguists have never found them actually being used as sounds in
any of the world’s languages. Sometimes they are found to exist by
some researcher somewhere, and if that happens then the International
Phonetics Association will add a symbol. The last time that happened was in 2005. But then there are shaded areas,
the shadow lands, the sounds that are theorized to be impossible
to produce. Imagine trying to produce a sound that’s in
the place of your mouth where you make a k or a g, but using the same method that
you use to go [rolled r]. You need some loose fold of tissue to make
that rapid trilling, and there’s just no flesh loose enough to
bounce around right at the back of the roof of your mouth,
at what’s called the velum. You could, I guess, in theory,
curve your tongue back there, but only by holding it too tense
to actually make a trill. So a velar trill is judged impossible.
By all means, try it. In the same way, if you try and cross the
place of your mouth and throat that you use to say “ha” or “uh-oh” with
the method you use to make the l sound, you’re going to run into problems. For “la” or “el” you let air escape from your
mouth around the sides of your tongue: lateral. But for “ha” you’re constricting the air down
in your throat at the vocal folds or glottis, and you can’t get your tongue down your throat
to create that centre blockage. I mean, your tongue has that flexibility
in your mouth, ‘l’, but you can’t close your airway like you’re
making a figure 8 out of a straw, and keep the air going round the sides. Unless you’re choking on food in exactly
the wrong way, and if you are, that’s not really speaking. A glottal lateral is judged impossible. All those shaded boxes have the same sorts
of limitations, where it’s not just that they would be difficult
to pronounce, they are impossible. Those gray boxes are forbidden
from human speech, not by choice of some High Council or the
International Phonetic Association, but just because of the
limitations of being human. Sometimes we do write things that we can’t
pronounce, like these: you can’t hold the letter p for that long, or this where all those letter Es
are silent! For more on how writing is
different to speaking, my co-author Gretchen McCulloch has a new book called
Because Internet, it’s available now,
and there are links in the description.

100 thoughts on “The Language Sounds That Could Exist, But Don’t

  1. And that's it for this run of the Language Files! Thanks to co-authors Gretchen McCulloch and Molly Ruhl, and animator Stephen Houston-Moore. And to answer the question that'll get asked ten times in response to this, these videos and comments get scheduled weeks in advance so I don't have to worry about actually being online when they launch.

  2. Hi Tom, I wonder if you can explain something to me. Why is it that in some languages(such as english and spanish) numbers above ten occasionally have names which are not related to the number plus ten they represent(eleven twelve) but in other languages such as hebrew they don't and are named like the rest of numbers between ten and twenty (אחד עשר, שנים עשר which can be roughly translated to oneteen, twoteen)

  3. OK his video is really interesting but thje specific example her used (velar trill) seems to me exactly like the type of noise one makes when they exaggeratedly build up a mouth full of spit.

  4. I'm not a professional linguist, but I feel this video misses an important point. I'm sure some of the blank box sounds are made, quite regularly, by humans, the important thing is whether distinguishing the sounds consistently carries meaning in a language. Labiodental plosives, for example, might be universally perceived as allophones with bilabial plosives (basically, both are just thought of as 'p' or 'b' sounds), such that in no language do labiodental vs. bilabial plosives distinguish meaning in words that are otherwise the same.

  5. IPA: p t k
    Tom Scott: pʰ tʰ kʰ

    IPA symbol p t k as consonants are not aspirated and should not be pronounced such at any time.

  6. Question. Is there some way we can get around the sounds that are impossible to make? Maybe use an AI or synthesis it to make the sound as close as possible to what we think it would be like?

  7. What if Klingon or Dothraki had included some of these never-used phonemes?
    What if aliens in movies spoke in computer-generated voices which were almost human, except that they used some of the phonemes which are impossible for the human vocal apparatus?
    People should consider it. Really, they should.

  8. We need to get rid of the letter "c". We have "k" and "s". We don't need "c". I know that sounds crazy, but it's just another thing we don't need to hold on to. Chances are you pronounce it wrong in some cases too. Say Julius Caesar. Did you use a hard "c"? If not, you're pronouncing it wrong. Now you know where "Kaiser" came from.

  9. i always noticed those weird symbols in translation boocks and such, and even knew how few of the where ponounced. but i never learned the name of the consept. now i do.

  10. I can do a velar trill better than a normal trill and I never realized it was a sound that people couldn't do what does this mean

  11. This comment is a bit late but I thought I should say that the Swedish southern accent "skånska" does have "r"s that is in the velar region, I think.. It's weird but many people actually use it in everyday life!

  12. to this chart, a "trill Valar" is impossible, i wholely disagree, it replicates the growls canines do
    (I can see many people like myself who have control to add "gutteral vocals" being able to make said noise fairly easily)

  13. Hawai'i includes the glottal stop in its spelling. The thing that looks like an apostrophe is a consonant ('okina) representing a glottal stop. It not really dependant on your accent, but rather just whether or not you are aware of it.

  14. You know you've taken too many math classes in your life if you look at that chart of all the sounds and go like- "look at all those math symbols…Why are there so many missing on this chart? "

  15. What about the swim German “chuchichäschtli”, the ch makes a vibrating sound in the back of the throat like the “impossible” sound? It’s sort of rolling the r sound but with k
    Or is it different?

  16. Where was this video three years ago when I was struggeling through my linguistic classes? Still can't here a lot of fine difference but at least now I finally understand the glottal stop. Just couldn't hear it in my lecturer's attempts

  17. I can easily trill with the same part of my throat just infront of the part that makes the glotal plosive. What would that be called? It tickles and doen’t sound phlemy or anything. Just makes it the sound come out… bubbly? Bumpy? I think most people can too. Just do your best Chewbacca impression.

  18. I wonder if they have dealt with the north nordic "sjoo" sound. (not sure how to spell that) , it is a sound made by inhaling air. (and BBC did a report on it, if I remember right)

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