In Chinese pinyin, ò is the yángqù tone (阳去, falling tone) of "o".
Emilian
Ò is used to represent Emilian pronunciation:[ɔː], e.g. òsEmilian pronunciation:[ɔːs] "bone".
Italian
In Italian, the grave accent is used over any vowel to indicate word-final stress: Niccolò (equivalent of Nicholas and the forename of Machiavelli).
It can also be used on the nonfinal vowels o and e to indicate that the vowel is stressed and that it is open: còrso, "Corsican", vs. córso, "course"/"run", the past participle of "correre". Ò represents the open-mid back rounded vowel /ɔ/ and È represents the open-mid front unrounded vowel /ɛ/.
Kashubian
Ò is the 28th letter of the Kashubian alphabet and represents /wɛ/, like the pronunciation of ⟨we⟩ in "wet".
Lombard
It is used to represent vocalic phonemes /ɔ/ and /ɔː/ in every tonic occurrence to distinguish them from /o/ and /oː/ represented by O, e.g. fiòrd /ˈfjɔːrd/ (fjord) and sord /ˈsuːrd/ (deaf); còta /ˈkɔta/ (cooked) and sota /ˈsota/ (under/below).
Louisiana Creole
It is used to represent /ɔ/ by many (but not all) speakers to distinguish it from /o/, represented by o.[1]
Macedonian
In Macedonian, о̀̀ is used to differentiate the word о̀̀д (English: walk) from the more common од (English: from). Both о̀̀ and о are pronounced as [o].
Norwegian
Ò can be found in the Norwegian word òg which is an alternative spelling of også, meaning "also". This word is found in both Nynorsk and Bokmål.
Romagnol
Ò is used to represent Romagnol pronunciation:[ɔ], e.g. piòRomagnol pronunciation:[pjɔ] "more".
In Welsh, ò is sometimes used, usually in words borrowed from another language, to mark vowels that are short when a long vowel would normally be expected, e.g., clòs (English: close [of the weather]).