A

• Armenian language (6 P)

B

• Baltic languages (5 P)

C

• Celtic languages (2 C, 13 P)

G

• Germanic languages (3 C, 5 P)

H

• Hellenic languages (1 C, 3 P)

I

• Indo-Iranian languages (2 C, 8 P)

L

• Latin language (3 C, 10 P)

R

• Romance languages (8 C, 58 P)

S

• Slavic languages (4 C, 10 P)

• Indo-European languages

*

• List of Indo-European languages

A

• Albanian language
• Anatolian languages

B

• Balto-Slavic languages
• List of Balto-Slavic languages

I

• Italic languages

L

• Latino-Faliscan languages
• Luwian language

P

• Parthian language
• Proto-Indo-European language

S

• Sicel language

T

• Tocharian languages