First of all, the RR isn't just an accent (it may of course) but it's for their
language <-- clickie which has many words with 'RR' in it, the famous Grrensholo ect.

Enkidukai would do it as G-'purr'-ensholo and non-enkidukai would make it sound like G-'rolling r'-ensholo
Second, if you look at purring as something you do to act out an emotion, like happiness. Then it would most likely be a discussion for the settings team first, because 'purring' would have a certain cultural standard on when to and when not to purr. I don't support players letting their enkidukai purr everywhere they go
If Purring is somewhat related to emotions I think an Enkidukai purr would be translated to non-enkidukais an "Aaaah" or "Ooooh", like when a dwarf drinks a beer after a hard day in the mines

Then it wouldn't be that weird to see an Enkidukai just purring and it's more controlled then animal behavior. But I'm not settings

(It could also just be that a purring Enkidukai just brags about something she/he can and others don't

)
I agree with purring going overboard, but everything going overboard is bad

That's why I think NPC's aren't purring when they give you a quest

Purring in front of a stranger...
