General meaning:
* Suomalainen legenda: This literally translates to "Finnish legend" and is the most direct option.
* Suomen taru: This translates to "Finnish tale" and can be used for both legends and myths.
Specific types of legends:
* Suomalainen kansantarina: This translates to "Finnish folk tale" and specifically refers to stories passed down through oral tradition.
* Suomalainen myytti: This translates to "Finnish myth" and refers to stories about gods, heroes, and creation.
* Suomalainen sankaritarina: This translates to "Finnish hero tale" and specifically refers to stories about legendary heroes.
Ultimately, the best translation will depend on the specific context of your use.