Some of accents on my Cardassia have very strong, vibrating R. Jarol's native Nokarrrrrrian, for example. I think she doesn't have it when she speaks the Unionese, but all Nokarian dialects have clear R, some stronger, some weaker, but veRy cleaR.
Lakarian accent, for some reason, has almost non-existing R. I wonder why?**
**For those who missed that conversation in the previous story comments: my Lakarians speak like Brits in English.