Helpful links 

Product 

• AI Localization: https://t3planet.de/t3al-typo3-erweiterung
• T3Planet: https://t3planet.de

API keys 

• DeepL – https://www.deepl.com/pro-api
• OpenAI – https://platform.openai.com/api-keys
• Google Gemini – https://aistudio.google.com/apikey
• Google Cloud Translation – https://cloud.google.com/translate
• Crowdin access tokens – https://crowdin.com/settings#api-key

TYPO3 

• TYPO3 documentation: https://docs.typo3.org/
• Localization with XLIFF: https://docs.typo3.org/m/typo3/reference-coreapi/main/en-us/ApiOverview/Localization/XliffFormat.html
• TYPO3 on Crowdin: https://crowdin.com/project/typo3-cms