Baltian

The Baltians are a species of tall, slender, grey-hued extraterrestrial humanoids that made first contact with a small group of Humans in 1961 in the state of New York, marking the beginnings of the Men in Black agency. On that occasion, a young Agent K presented them with flowers. The Baltians have kept in contact with the MiB since then and returned to Earth about every ten years to offer the latest new technologies to the Human race. The resulting patents provide the necessary funding for the MiB without the need to involve the government or other private sources. It is also implied that the Baltians' technological gifts may be one of the main reasons for the increasingly fast technological advancements of the late 20th century on Earth.

Behind the Scenes

 * Originally, the plot revolved around a battle between the Arquillians and the Baltians, another alien race. They decided they didn't need the Baltian subplot, so they changed the subtitles in the diner scene.

Source
https://m.imdb.com/title/tt0119654/trivia/?ref_=tt_trv_trv