According to an anonymous source, Lithuanian girls are like all girls and they love attention and these lines are very good apparently! My source is extremely hot by the way and has heard more than her share of compliments, so these are definitely worthwhile to try out!
(Note the grammatical syntax: tu=you esi=are labai=very) This is written from the perspective of a guy complimenting a girl i.e. the words have feminine genders!
Tu esi labai graži You are very beautiful/good looking etc.
Tu esi labai nuostabi You are very amazing/wonderful etc.
Tu esi labai protinga You are very smart/intelligent/clever etc.
Tu esi labai miela You are very cute/nice/sweet etc.
Tu esi labai puiki You are very nice/sweet etc.
Alright these here are pretty complex, I just know the translation, I won’t bother with the grammar yet! I have no idea about the syntax with these ones but you can try these out anyways and they’re probably missing accented characters too!
Tu tokia saldi. Kaip cukrus You are sweet. Like sugar.
Man patinka tavo humoro jausmas I like your sense of humour.
Tu man vienintele You are the one for me. (p.s. be careful!)
Tavo nuostabios akys You have beautiful eyes. (Use akis to say you have a beautiful eye)
And finally a good pickup line is always handy and I made sure to get a good corny one translated!
Ar turi zemelapi? Nes as baigiu pasiklysti tavo akyse Do you have a map? Because I’m lost in your eyes.
– EDIT
Aš tave/jus įsimylėjau iš pirmo žvilgsnio.I felt in love with you at first sight. (credits to Snobas!)
Enjoy!