In my world, there is a mammalian species from the Homo genus called "ogres" (their scientific name is Homo obesus) (they are still humans, just not Homo sapiens) (Homo obesus means "obese human").
In the most spoken language used by ogres, there are three rhotic sounds: the weak English "r" sound, the guttural "r" sound (as in French rédemption) (rédemption naturally means redemption), and the trilled "r" sound (the Russian "r").
In most real life human languages, there is only one rhotic sound.
The most common rhotic sound around the world's languages is the alveolar trill. This phoneme is used in Slavic languages (like Russian, Polish, and Ukrainian), in some Germanic languages (like Afrikaans, and Icelandic), Greek, and even some non-Indo-European languages (like Thai).
Many languages use the guttural rhotic sound as a speech impediment. The only languages I know that normally only use the guttural "r" are French (my first language), German, Yiddish, and (surprise) Hebrew.
The weak English "r" sound is rare among most human languages around the world... except in Aboriginal Australian languages where it is extremely common! That said, this phoneme is also found in Wu varieties of the Chinese language, including Shanghainese.
Also, the Japanese "r" sound is one of the world's rarest phonemes.
However, some languages have both a tapped "r" sound and a trilled "r" sound, or alternatively, both a guttural "r" sound, and an alveolar "r" sound: Spanish, Portuguese, Dutch, Persian, Hungarian, and Arabic.
So, I wonder why would a language have three rhotic phonemes.