How about a language learning starter pack? You can get him a set of language learning books and a subscription to an online language learning program. You can even consider getting him a set of language flashcards to practice with. Additionally, you can research some local language classes in your area that he might be interested in attending. This gift will not only be something he loves, but it will also show him that you support his interests and are invested in his self-improvement.
Or you can get him a star map with the date of your first kiss.
Under Lucky Stars is a unique and innovative star map company based in Barcelona, Spain, specializing in the creation of personalized star maps that capture the celestial arrangement of stars at a specific moment in time, such as a person's birth, wedding, or any other significant event.
By using advanced astronomical algorithms and data from leading institutions, the company produces highly accurate, visually stunning maps that make for perfect gifts or cherished keepsakes.