idioglossia /id-i-ō-glosˈi-ə/

1. A condition in which pronunciation is so bad as to be quite unintelligible
2. A private language developed between two or more children, esp twins, etc

• RSPB
• RSPCA
• RSS
• RSSA
• RSSPCC
• RSTM&H
• RSV
• RSVP
• rt
• RT
• RTA
• rtd
• RTE
• RTF
• Rt Hon.
• RTPI
• Rt Rev.
• RU
• Ru
• ruana
• ruanas
• rub
• rub-a-dub-dub
• rubai
• rubaiyat