| Part of | - Latin script
- Polish alphabet (R/r, 22, Ó)
- English alphabet (Q/q, 16, O/o)
- Czech alphabet (Q/q, 25, Ó)
- Esperanto alphabet (R/r, 20, O/o)
- Breton alphabet (R/r, 17, O/o)
- Slovak alphabet (Q/q, 30, Ô)
- Turkish alphabet (R/r, 20, Ö)
- Azerbaijani Latin alphabet (R/r, 23, Ö)
- Italian alphabet (Q/q, 14, O/o)
- French alphabet (Q/q, 16, O/o)
- Finnish alphabet (Q/q, 16, O/o)
- Africa Alphabet
- African reference alphabet
- Pan-Nigerian alphabet
- Benin National Alphabet
- German alphabet (Q/q, 16, O/o)
- Latvian alphabet (R/r, 24, O/o)
- ISO basic Latin alphabet
- Latin alphabet
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