伪西里尔字母（英语：faux Cyrillic、pseudo-Cyrillic），或称伪俄文（faux Russian、pseudo-Russian）是在该用拉丁字母的地方用看起来相似的西里尔字母所取代以让人想到这个词与俄罗斯、苏联、东欧有关。比如俄罗斯人“RUSSIAN”会被写成“ЯUSSIAИ”（以Я代替R，以И代替N）——事实上俄罗斯人这个词在俄语应该拼做“Русские”。

使用这种文本效果时，要求源文本全部用大写字母书写，因为一来西里尔字母与很多小写拉丁字母外形不匹配，二来大部分西里尔字母大小写看起来一样。

Faux Cyrillic, pseudo-Cyrillic, pseudo-Russian or faux Russian typography is the use of Cyrillic letters in Latin text to evoke the Soviet Union or Russia.

This is a common Western trope used in book covers, film titles, comic book lettering, artwork for computer games, or product packaging which are set in or wish to evoke Eastern Europe, the Soviet Union, or the Russian Federation. An early example was the logo for Norman Jewison's film The Russians Are Coming, the Russians Are Coming and more recently the logo for Sacha Baron Cohen's film Borat. In the music industry, the Simple Minds album Empires and Dance and the Spandau Ballet album Journeys to Glory, both 1981, provide examples in the cover artwork (the former with reversed Rs and Ns yielding Я and И, the latter with Д and Ф replacing A and O, respectively).