Proto-Slavic *dъlgъ

→ Belarusian доўг (inherited)

→ Bulgarian дълг (inherited)

→ Bulgarian длъжен (mention)

→ Czech dluh (inherited)

→ Old Church Slavonic дългъ (inherited)

→ Old Church Slavonic длъгъ (inherited)

→ Lower Sorbian dług (inherited)

→ Macedonian долг (inherited)

→ Polish dług (inherited)

→ Russian долг (inherited)

→ Serbo-Croatian dug (inherited)

→ Serbo-Croatian дуг (inherited)

→ Slovak dlh (inherited)

→ Slovene dolg (inherited)

→ Ukrainian довг (inherited)