Nationaalinen
Nationaalinen is an adjective that, in Finnish, can be interpreted as meaning “national” or “relating to a nation” when encountered in certain contexts. In practice, Finnish normally expresses this sense with the native word kansallinen. Nationaalinen tends to appear mainly in bilingual or international texts, translations, or academic writing where there is an attempt to preserve a loanword flavor from other languages such as Dutch (nationaal) or English (national).
Etymology and status: the form is formed in Finnish by adding the standard adjectival suffix -inen to
Usage and notes: in most Finnish contexts, especially in journalism, government, and education, the preferred term
See also: kansallinen, nationaal (Dutch), national (English).
In sum, nationaalinen is a niche, loanword-adjunct form meaning national, used primarily in specialized or international-language