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.
Helki is not Finnish
The plural of Finnish Spitz is "Finnish Spitz".
How is miten in Finnish.
For you is sinulle in Finnish.
Finnish is spoken in Finland.
Finnish
You are Finnish: "Sinä olet suomalainen." I am Finnish: "Minä olen suomalainen." Suomalainen is spelt with a lower case s.
It is also "Helsinki" in Finnish.
A hummingbird is kolibri in Finnish.