Ê based on E
Chinese
In the Pinyin romanization of Standard Mandarin Chinese, ê represents /ɛ/. It corresponds to Zhuyin ㄝ. The circumflex occurs only if ê is the only letter in the syllable: ề /ɛ̂/ (诶; 誒; "eh!"). Without the circumflex, e as, the only letter in the syllable, represents /ɤ/: è /ɤ̂/  (饿; 餓; "hungry"). Elsewhere, /ɛ/ is written as a (before n) or e (at the end of a syllable), with the appropriate tone mark,: xiān /ɕi̯ɛ́n/ (先; "first"), xuǎn /ɕy̯ɛ̀n/ (选; 選; "to choose"), xué /ɕy̯ɛ̌ ~ ɕy̯ě/ (学; 學; "to learn"), xièxie /ɕi̯ɛ̂.ɕi̯ɛ ~ ɕi̯ê.ɕi̯e/ (谢谢; 謝謝; "thanks").
In Pe̍h-ōe-jī, ê is the fifth tone of e: ê (的; possessive, adjectival suffix).French
Diacritics are not considered to be distinct letters of the French alphabet. In French, ê changes the pronunciation of e from /ə/ to /ɛ/. It is used instead of "è" for words that used to be written "es".Friulian
Ê represents /eː/ and /ɛː/.Khmer
Ê is used in UNGEGN romanization system for Khmer to represent /ae/ and /ɛː/, for example Khmêr (ខ្មែរ  [kʰmae]) and Dângrêk Mountains (ដងរែក  [ɗɑːŋrɛːk]).Kurdish
Ê is the 7th letter of the Kurdish Kurmanji alphabet and represents /eː/.Norwegian Nynorsk
In Nynorsk, ê is used to represent the reduction of the Old Norse sequence <eð>, similar to the use of ê for the historical sequence <es> in French. It is mostly used to differentiate words which otherwise would be spelled the same, e.g. vêr 'weather' and ver, imperative of 'to be'.Vietnamese
Ê is the 9th letter of the Vietnamese alphabet and represents /e/. In Vietnamese phonology, diacritics can be added to form five forms to represent five tones of ê:Ề ề
Ể ể
Ễ ễ
Ế ế
Ệ ệWelsh
In Welsh, ê represents long stressed e [eː] if the vowel would otherwise be pronounced as short [ɛ]: llên [ɬeːn] "literature", as opposed to llen [ɬɛn] "curtain", or gêm [ɡeːm] "game", as opposed to gem [ɡɛm] "gem, jewel". That is useful for borrowed words with a final stress like apêl [apˈeːl] "appeal".