New apps Added

custom_components/maintenance_supporter/helpers/i18n.py

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+"""Internationalization helpers."""
+
+from __future__ import annotations
+
+from homeassistant.core import HomeAssistant
+
+
+def normalize_language(hass: HomeAssistant) -> str:
+    """Return the HA UI language as a lowercase 2-letter table key.
+
+    HA emits regional language codes (e.g. ``zh-Hans``, ``zh-Hant``,
+    ``pt-BR``), but the integration's localization tables — the
+    calendar/notification/config-flow Python string dicts, the
+    ``name_<lang>`` template fields, and the ``styles.ts`` panel strings —
+    are keyed by the bare 2-letter prefix. Centralizing the normalization
+    keeps every consumer identical, so a regional-code user never silently
+    falls back to English. Defaults to ``en`` when the language is unset.
+    """
+    return (getattr(hass.config, "language", None) or "en")[:2].lower()