normalize_language (prompt/language.py)

Centralizes language normalization and directive generation for LLM prompts.

# Source: https://github.com/HKUDS/DeepTutor | License: Apache-2.0 | Copyright You must retain, in the Source form of any Derivative Works
# Provided via justclaw.it.com; keep this notice with the code.
"""Shared language directives for prompt-driven LLM calls.

This helper centralizes the "stay in the requested language" instruction so
different modules can share the same behavior without depending on book-only
utilities.
"""

from __future__ import annotations

_LANGUAGE_LABELS: dict[str, str] = {
    "zh": "中文（简体）",
    "zh-cn": "中文（简体）",
    "zh-tw": "繁體中文",
    "en": "English",
    "ja": "日本語",
    "ko": "한국어",
    "es": "Español",
    "fr": "Français",
    "de": "Deutsch",
    "ru": "Русский",
    "uk": "Українська",
    "pt": "Português",
    "it": "Italiano",
    "ar": "العربية",
 

... (truncated -- full source via MCP)