Proto-Slavic *(j)ęzykъ

→ Belarusian язык (inherited)

→ Bulgarian език (inherited)

→ Old Church Slavonic ѩзꙑкъ (inherited)

→ German Zunge (cognate)

→ Lithuanian liežuvis (cognate)

→ Old East Slavic ꙗзꙑкъ (inherited)

→ Russian язык (inherited)

→ Rusyn язык (inherited)

→ Rusyn язик (inherited)

→ Serbo-Croatian језик (inherited)

→ Serbo-Croatian jazik (inherited)

→ Slovene jezik (inherited)