In Cyrillic languages such as Russian, it is not unusual to put accents on vowels to disambiguate some words (for instance чудно́е and чу́дное) and in a few other cases.
It appears that the rendering of Cyrillic accented letters is not done properly when using Spectral. The problem can be seen, for instance, by comparing Spectral with other fonts on Google Fonts. On the screenshot below, some fonts, such as Cormorant, Old Standard TT and Alice, are doing it correctly. Others, such as Spectral and Literata, are putting the accent too much to the right. Others, such as Playfair Display SC, are completely messing up both the position of the accent and the spacing.

Is it possible to adjust the position of the accent on the combination of U+0301 with Cyrillic characters а́, е́, и́, о́, у́, ы́, э́, ю́, and я́?