Where does “syrjääninkielinen” come from?

syrjääninkielinen (Finnish) comes from Finnish kieli, from Proto-Finnic keeli, from Proto-Uralic käle — tongue; language.

Ancestry of “syrjääninkielinen”, step by step

syrjääninkielinen traces back through two separate lines of ancestry.

via Finnish kieli

StepLanguageWordMeaning
1Finnishkielitongue; language; string
2Proto-Finnickeelitongue; language
3Proto-Uralickäletongue; language

via Finnish syrjääni

StepLanguageWordMeaning
1FinnishsyrjääniKomi, Zyrian language
2Russianзыря́нинKomi (person)
Every word from Proto-Uralic käle →Every word from Proto-Finnic keeli →Every word from Finnish kieli →