In finnish lunar would be a prefix, and would not stand alone as a word.
Moon: Kuu
Lunar: kuu- or kuun-
For example:
The lunar surface: Kuunpinta
The Finnish language is suomi (Finnish) or suomen kieli (Finnish language) in Finnish.
Finnish legend in Finnish is "suomalainen legenda".
I am not Finnish. - (Minä) en ole suomalainen.
The plural of Finnish Spitz is "Finnish Spitz".
Helki is not Finnish
For you is sinulle in Finnish.
How is miten in Finnish.
Finnish
Finnish is spoken in Finland.
You are Finnish: "Sinä olet suomalainen." I am Finnish: "Minä olen suomalainen." Suomalainen is spelt with a lower case s.
Stockings are sukkahousut in Finnish.
That word is not Finnish.