DeepL consistently outperforms Google Translate for European languages in accuracy and naturalness. For Asian languages (Chinese, Japanese, Korean), both perform similarly.
DeepL has a free plan that translates up to 500,000 characters/month with file upload limits. The Pro plan from $8.99/month removes limits and adds API access.
AI translation is good for understanding legal documents but should not be used as a certified legal translation. For official purposes, always use a certified human translator.