conftest.py

import pytest
from selenium import webdriver
from selenium.webdriver.chrome.options import Options
from selenium.webdriver.chrome.service import Service as ChromeService  
from webdriver_manager.chrome import ChromeDriverManager 


def pytest_addoption(parser):
    parser.addoption('--language', action='store', default='en', help='Choose language')


@pytest.fixture(scope="function")
def browser(request):
    user_language = request.config.getoption('language')
    
    options = Options()
    
    options.add_experimental_option('prefs', {'intl.accept_languages': user_language})
    browser = webdriver.Chrome(options=options, service=ChromeService(ChromeDriverManager().install()))
    
    browser.implicitly_wait(5)
    yield browser
    browser.quit()