This template provides the inflection of Bulgarian feminine nouns that end in a vowel + я, which means that they form the vocative with -йо (змия - змийо, запетая - запетайо, etc.). The parameter is the singular indefinite form without the final -я (зми and запета respectively). For example, {{bg-noun-f-ya1|зми}} produces the inflection of the noun змия.

The template adds the entry to Category:Bulgarian nouns.