app/models/schemas.py

from pydantic import BaseModel
from typing import Optional, List

class TranslationRequest(BaseModel):
    text: str
    source_lang: Optional[str] = "auto"
    target_lang: str = "ru"

class TranslationResponse(BaseModel):
    original_text: str
    translated_text: str
    source_lang: str
    target_lang: str
    pronunciation: Optional[str] = None