When I put SWE_IA, then I get
[1] "distance%=0.8327"
ph2ter
BALTO-SLAVIC,63
SOUTHEAST_GERMANIC,20.8
BALKAN,9.6
SWE_IA,4
ROMAN,2.6
SWE_IA is Nordic, but have some leanings toward Baltic.
And + RUS_Ingria_IA
[1] "distance%=0.7732"
ph2ter
BALTO-SLAVIC,49.6
SOUTHEAST_GERMANIC,20.8
BALKAN,12.8
RUS_Ingria_IA,10.2
ROMAN,3.8
SWE_IA,2.8