PanLinx
ISO 639-2/T
art-002
bre
ISO 639-3
art-001
bre
ISO 639-2/B
art-003
bre
ISO 639-1
art-004
br
ISO 639-3 Reference Names
art-289
Breton
ISO 639-3 Print Names
art-290
Breton
ISO 639-3 Inverted Names
art-291
Breton
PanLex