How do you spell Lettic

Available Definitions:
1)  a. - Of or pertaining to the Letts; Lettish.
2)  a. - Of or pertaining to a branch of the Slavic family, subdivided into Lettish, Lithuanian, and Old Prussian.
3)  n. - The language of the Letts; Lettish.
4)  n. - The language of the Lettic race, including Lettish, Lithuanian, and Old Prussian.