The spellings of directory names follow the "Streamlined system for the romanization of Bulgarian" (official since 2006).

In particular, а or ъ = a, ч = ch, х = h, с = s, ш= sh, щ = sht, ц = ts, у = u, й or ь = y, я = ya, ю = yu, з = z, ж = zh.

Some description texts may use different systems, hence the variations in spelling.

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