For English pronunciation, there's also the Color Vowel Chart. https://americanenglish.state.gov/resources/color-vowel-chart https://americanenglish.state.gov/

For English pronunciation, there's also the Color Vowel Chart. https://americanenglish.state.gov/resources/color-vowel-chart https://americanenglish.state.gov/resources/color-vowel-char... One of the developers of this technique of teaching English sounds is a friend of mine. There's also games, matching words to colors, that can be played with all ages. The few times I've been able to participate in one of these sessions, I learn something... The difference between "door", "orange", and "dog" -- in southeastern states, I hear a vowel shift from one towards the others. My Californian friends couldn't quite hear it.