Use Fluent to localize your Python application.
It comes with a Localization class to use, based on an implementation of FluentBundle.
It uses the parser from fluent.syntax to read Fluent files.
from datetime import date
l10n = DemoLocalization("today-is = Today is { $today }")
val = l10n.format_value("today-is", { "today": date.today() })
val # 'Today is Jun 16, 2018'Find the full documentation at https://projectfluent.org/python-fluent/fluent.runtime/.