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i18n: normalize Telegram region codes in locale detection

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Resolve user locale by checking the Telegram language code as-is, then
its Babel-normalized form, then the base language. This fixes lowercase
regional codes such as pt-br failing to match available translations like
pt_BR. Add tests covering region-code variants and fallback behavior, and
update i18n documentation plus changelog notes.
This commit is contained in:
mahisafa82 2026-02-26 03:07:37 +03:30
parent 73710acb4c
commit 53ad537739
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4 changed files with 55 additions and 4 deletions
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36
tests/test_utils/test_i18n.py
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@ -149,6 +149,42 @@ class TestSimpleI18nMiddleware:
)
assert locale == i18n.default_locale
@pytest.mark.parametrize(
("available_locales", "default_locale", "language_code", "expected_locale"),
[
({"pt-br": None}, "en", "pt-br", "pt-br"),
({"pt_BR": None}, "en", "pt-br", "pt_BR"),
({"pt-br": None, "pt_BR": None}, "en", "pt-br", "pt-br"),
({"en": None}, "uk", "en-US", "en"),
({"uk": None}, "en", "uk-UA", "uk"),
],
)
async def test_get_locale_region_code_variants(
self,
i18n: I18n,
available_locales: dict[str, None],
default_locale: str,
language_code: str,
expected_locale: str,
):
i18n.default_locale = default_locale
middleware = SimpleI18nMiddleware(i18n=i18n)
i18n.locales = available_locales
locale = await middleware.get_locale(
None,
{
"event_from_user": User(
id=42,
is_bot=False,
first_name="Test",
language_code=language_code,
)
},
)
assert locale == expected_locale
async def test_custom_keys(self, i18n: I18n):
async def handler(event, data):
return data