Lua error in Module:User:Benwing2/ky-noun at [[Module:User:Benwing2/ky-noun#L-128|line 128]]: Last vowel 'Benwing2/ky-decl-noun-sg' of lemma 'Benwing2/ky-decl-noun-sg' doesn't match any known letter class

Backtrace:

[C]: in function "error"
Module:User:Benwing2/ky-noun:128: in function "add"
Module:User:Benwing2/ky-noun:141: in function "decline_noun"
Module:User:Benwing2/ky-noun:408: in function "do_generate_forms"
Module:User:Benwing2/ky-noun:421: in function "chunk"
mw.lua:527: ?
[C]: ?