| Name | Other Name | Family | Nativ Name | ISO6391 Code | ISO6392T Code | ISO6392B Code | ISO6393 Code | Notes |
|---|---|---|---|---|---|---|---|---|
| Portuguese | Indo-European | Português | pt | por | por | por | ||
| Pashto | Pushto | Indo-European | پښتو | ps | pus | pus | pus + 3 | macrolanguage |
| Quechua | Quechuan | Runa Simi; Kichwa | qu | que | que | que + 44 | macrolanguage | |
| Romansh | Indo-European | Rumantsch Grischun | rm | roh | roh | roh | ||
| Romanian | Moldavian;Moldovan | Indo-European | Română | ro | ron | rum | ron | The identifiers mo and mol are deprecated; leaving ro and ron (639-2/T) and rum (639-2/B) the current language identifiers to be used for the variant of the Romanian language also known as Moldavian and Moldovan in English and moldave in French. The identifiers mo and mol will not be assigned to different items; and recordings using these identifiers will not be invalid. |
| Rundi | Niger–Congo | Ikirundi | rn | run | run | run | also known as Kirundi | |
| Russian | Indo-European | русский | ru | rus | rus | rus | ||
| Sango | Creole | yângâ tî sängö | sg | sag | sag | sag | ||
| Sanskrit | Indo-European | संस्कृतम् | sa | san | san | san | ancient; still spoken; also known as Saṃskṛta | |
| Sinhala | Sinhalese | Indo-European | සිංහල | si | sin | sin | sin |