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R
| Language name | Native name | Code |
|---|---|---|
| Rajasthani | राजस्थानी | RAJ |
| Rapanui | Rapanui, Pepito Ote Henua | RAP |
| Rarotongan; Cook Islands Maori | - | RAR |
| Reserved for local use | - | QAA |
| Romance languages | - | ROA |
| Romanian; Moldavian; Moldovan | Română | RUM |
| Romansh | Rumantsch Grischun | ROH |
| Romany | Rromani Ćhib, Romani Šib, Romanó | ROM |
| Rundi | Kirundi | RUN |
| Russian | Русский Язык | RUS |