музеа/музея

[hectoralos]

One of the two possible dative forms of музей is музея (the other is музее), but instead музеа is recognised/generated. Vowel+a requests an epenthetic й: музея.

[ftyers]

There are two possibilities in the lexicon:

$ echo "музей<n><dat>" | hfst-lookup .deps/chv.LR.lexc.hfst 
музей<n><dat>   музей>{N}{A}    0,000000
музей<n><dat>   музей{ъ}>{N}{A} 1,000000

$ echo "музей<n><dat>" | hfst-lookup .deps/chv.LR.hfst 
музей<n><dat>   музее   0,000000
музей<n><dat>   музеа   1,000000

One of them is wrong, the other is ok. The problem is in the twol rule:

"Back vowel harmony for yotised {A}"
%{A%}:я <=> [ UnderBack: | BackVow | :BackVow ] [ :Cns | :0 ]* й:0 %>: [ :Cns | :0 ]*  _ ;
        except
                                                          _ %>: %{и%}: %{н%}: [ %>: %{N%}: %{A%}: | %>: :Cns | .#. ] ; ! ger
                                                           [ %{T%}: | р ] _ %>: %{х%}:0 ; ! loc.attr

Note how it doesn't take into account the {ъ} that can appear after й:0.

Changing it (and some other rules that depend on it) results in:

$ echo "музей<n><dat>" | hfst-lookup .deps/chv.LR.hfst 
музей<n><dat>   музее   0,000000
музей<n><dat>   музея   1,000000

Should be fixed in 9c8b5eb .

[hectoralos]

Gràcies! Funciona.