ð, or i, called dotted I or i-dot, is a letter used in the Latin-script alphabets of Azerbaijani, Crimean Tatar, Gagauz, Kazakh, Tatar, and Turkish. It commonly represents the close front unrounded vowel except in Kazakh in which it additionally represents the voiced palatal approximant and the diphthongs and . All languages that use it also use its dotless counterpart I, but not the basic Latin letter I.
The dotted I is encoded into Unicode with the code point U+0130 (U+0069 for the lowercase letter) as part of the Latin Extended-A block.
The dotted and dotless I characters have caused issues in computing. Languages like Turkish have four variants of the letter I (as opposed to two in English). This causes problems when, instead of the original mapping of i to I, Turkish maps i to the new ð, and ñ to I, frequently breaking software logic.
Both the dotted and dotless I can be used in transcriptions of Rusyn to allow distinguishing between the letters ë and ÃÂ, which would otherwise be both transcribed as "y", despite representing different phonemes. Under such transcription the dotted ð would represent the Cyrillic ÃÂ, and the dotless I would represent either ë or ÃÂ, with the other being represented by "Y".
The letter ð can be found with an acute, grave, tilde, ogonek or stroke accent.
Examples: