Translation of dropdown options doesn't work

[Denis Rykov]

I develop pyramid application and use pyramid formalchemy   fa.jquery. The name of application is ng_ornito.

When I describe models I use TranslationStringFactory:

from pyramid.i18n import TranslationStringFactory

_ = TranslationStringFactory('ng_ornito')

class Bird(Base):

    __tablename__ = 'bird'

    __label__ = _(u"Вид")

    __plural__ = _(u"Виды")

    id = Column(Integer, primary_key=True, label=_(u"Номер записи"))

    name_lat = Column(Unicode, unique=True, label=_(u"Латинское название"))

    name_rus = Column(Unicode, label=_(u"Русское название"))

...

class Report(Base):

    __tablename__ = 'report'

    __label__ = _(u"Наблюдение")

    __plural__ = _(u"Наблюдения")

    id = Column(Integer, primary_key=True, label=_(u"Номер записи"))

...

This part works fine, After compilation *.po file when I change language - form's name and field's label is translated flawlessly.

Then I modify my faforms.py file:

from models import _

Report.append(Report.age_class.dropdown(options=[_(u"Взрослая"),

                                                 _(u"Полувзрослая"),

                                                 _(u"Слёток"),

                                                 _(u"Птенец"),

                                                 _(u"Возраст не определён")]))

This part doesn't work. When I change language - dropdown options not translates. Also even if I use en locale month's names in date field looks like month_01, month_02.