Language codes (3 letters) Abbreviations and Acronyms
- OTATurkish, Ottoman (1500 - 1928)
- OTOOtomian Languages
- OYKShallow abal, Australian Aboriginal language
- PAAPapuan- Australian (Other)
- PAGPangasinan
- PALPahlavi
- PAMPampanga
- PANPanjabi
- PDEPresent-Day English
- PEOPersian, Old (ca. 600 - 400 B. C.)
- PERPersian
- PERSPersian
- PHNPhoenician
- PHOENPhoenician
- PIEProto-Indo-European
- PLIPali
- POJLOWER POKOMO: A language of Kenya
- POLPolish Language (ISO 639-2 Code)
- PONPonape
- PORPortuguese Language (ISO 639-2 Code)
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