What tools can be used to test application internationalization?

You can use:

• Manual testing:
  • Changing OS/browser regional settings.
  • Checking localized strings (translations, grammar).
  • Testing date, time, number, and currency formatting.
  • Checking text display (string length, line breaks).
  • Testing sorting according to localized rules.
• Automated testing:
  • UI testing frameworks (Selenium, Cypress, Playwright) for changing locale and verifying element display.
  • Tools for checking strings in resources (e.g., searching for hardcoded strings).
  • Libraries for localization handling in code (e.g., comparing keys and values in different language files).
• Specialized tools:
  • Localization management platforms (TMS - Translation Management Systems).
  • Static code analysis tools to identify localization issues (e.g., LINT rules).
  • Tools for pseudo-localization testing.

Example of UI localization testing with Selenium (Python):

# test_localization.py
from selenium import webdriver
from selenium.webdriver.common.by import By

def test_localized_text():
    options = webdriver.ChromeOptions()
    # Set browser language
    options.add_argument("--lang=fr") 
    driver = webdriver.Chrome(options=options)
    try:
        driver.get("http://your_app_url")

        # Check the text of an element in French
        greeting_element = driver.find_element(By.ID, "greeting")
        assert "Bonjour" in greeting_element.text, "Incorrect greeting in French"

    finally:
        driver.quit()