Speech impediment - slurred speech


Is there a name for a speech impediment like this where, for lack of a better
description, it sounds like you're talking after you've bitten your tongue?

### 「いだだきまあず」 → いただきます

[![enter image description
here](https://i.stack.imgur.com/9Mmxr.jpg)](https://i.stack.imgur.com/9Mmxr.jpg)

### 「ごぢぞうざまでぢだあ」 → ごちそうさまでした

[![enter image description
here](https://i.stack.imgur.com/pspNA.jpg)](https://i.stack.imgur.com/pspNA.jpg)

[Here's the video](https://youtu.be/-ktqEPdOz1s?t=6m23s) I took the
screenshots from, but the audio doesn't completely match the words on the
screen. (Also, I couldn't figure out how to link between a particular start
and end time on the video.)




There is a word
[鼻声【はなごえ】](http://dictionary.goo.ne.jp/jn/178286/meaning/m0u/), which is
understood by all native speakers. Exaggerated examples would be:

>   * がぜびぎまじだぁ （風邪引きましたぁ）
>   * [あ゛あ゛あ゛](https://japanese.stackexchange.com/q/32622/5010)、ごめんなざい～
> （ごめんなさい～）
>

But this usually refers to a temporary symptom of a normal human being.

For a yokai like this, I would use 鼻の詰まったような声, 鼻にかかったような声,
[くぐもった](http://dictionary.goo.ne.jp/jn/60868/meaning/m0u/)声,
[こもった](http://dictionary.goo.ne.jp/jn/82367/meaning/m0u/%E3%81%93%E3%82%82%E3%82%8B/)声
or 濁った声. You can use 常に濁音で喋る although this doesn't look technical at all.




There is a word
[鼻声【はなごえ】](http://dictionary.goo.ne.jp/jn/178286/meaning/m0u/), which is
understood by all native speakers. Exaggerated examples would be:

>   * がぜびぎまじだぁ （風邪引きましたぁ）
>   * [あ゛あ゛あ゛](https://japanese.stackexchange.com/q/32622/5010)、ごめんなざい～
> （ごめんなさい～）
>

But this usually refers to a temporary symptom of a normal human being.

For a yokai like this, I would use 鼻の詰まったような声, 鼻にかかったような声,
[くぐもった](http://dictionary.goo.ne.jp/jn/60868/meaning/m0u/)声,
[こもった](http://dictionary.goo.ne.jp/jn/82367/meaning/m0u/%E3%81%93%E3%82%82%E3%82%8B/)声
or 濁った声. You can use 常に濁音で喋る although this doesn't look technical at all.

