Please tell me:
* What is their name?
* What was their connection to Portugal or the Portuguese language? (Were they a native speaker, did they live in Portugal, did they love the culture, etc.)
* What do you want to convey in the tribute? (Share a favorite memory, express your love and gratitude, etc.)
Once you provide me with this information, I can help you craft a meaningful and personal "In loving memory of..." message.