Question: Looking for a free online translation service that can handle longer passages of text, with the option to upgrade for more features.

First, Reverso offers a full-featured translation service in 15 languages. It uses AI for translations, and also offers grammar and spell checking. You can translate documents in many file formats, too, preserving formatting. You can use the free version for casual needs, but you'll need to pay for AI-based grammar and spell checking, and verb conjugation.

Another powerful option is DeepL, which supports several languages and offers both free and paid subscriptions. It can translate text, documents and websites with good quality and natural-sounding results. DeepL is good for anyone who needs to bridge language gaps, whether that's for personal or professional reasons.