Indian accents can be characterized by the fact that speakers retroflex their consonants.
Examples of retroflex
retroflex
The retroflex flap is a type of consonantal sound, used in some spokenlanguages.
From the en.wikipedia.org
The Iwaidja language of Australia has both alveolar and retroflex lateral flaps.
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Most of the dialects in eastern and central Norway use the retroflex consonants.
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Most southern, western and northern dialects do not have these retroflex sounds.
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The retroflex nasal is a type of consonantal sound, used in some spokenlanguages.
From the en.wikipedia.org
Like Northern Mandarin, it has preserved the retroflex initials of Middle Chinese.
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The Nuristani languages of eastern Afghanistan also have retroflex consonants.
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To the Indian ears, the English alveolar plosives sound more retroflex than dental.
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Historically, the dental stops and retroflex stops both merged into alveolar stops.
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More examples
Bent or curved backward
Cacuminal: pronounced with the tip of the tongue turned back toward the hard palate
Articulate (a consonant) with the tongue curled back against the palate; "Indian accents can be characterized by the fact that speakers retroflex their consonants"
In phonetics, retroflex consonants are consonant sounds used in some languages. (They are sometimes referred to as cerebral consonants, especially in Indology. ...
A type of consonant created by the tongue being placed on or near the roof of the mouth just behind the alveolar ridge (see definition above).
In linguistics, any sound produced with the tongue-tip bent or curled backward--such as the sound of the liquid <r>. Retroflex <r>s over time often change into the liquid <l> and vice-versa. ...
Sounds produced by curling the tongue tip back and articulating against the rear slope of the gum ridge (like the sound 'ada').