Like Finnish, Estonian employs the Latin script as the basis for its alphabet, which adds the letters ä, ö, ü, and õ, plus the later additions š and ž. The letters c, q, w, x and y are limited to proper names of foreign origin, and f, z, š, and ž appear in loanwords and foreign names only. Ö and ü are pronounced similarly to their equivalents in Swedish and German. Unlike in standard German but like Finnish and Swedish (when followed by 'r'), Ä is pronounced [æ], as in English mat. The vowels Ä, Ö and Ü are clearly separate phonemes and inherent in Estonian, although the letter shapes come from German. The letter õ denotes /ɤ/, unrounded /o/, or a close-mid back unrounded vowel. It is almost identical to the Bulgarian ъ /ɤ̞/ and the Vietnamese ơ, and is used to transcribe the Russian ы.