[int_19h]

Slavic is somewhat more conservative and still has a bunch of archaic proto-Slavic and even proto-Indo-European stuff in it. Even most of the basic swearwords are still readily recognizable from PIE, which I always found particularly amusing:

https://en.wiktionary.org/wiki/Reconstruction:Proto-Slavic/x...

https://en.wiktionary.org/wiki/Reconstruction:Proto-Slavic/p...

https://en.wiktionary.org/wiki/Reconstruction:Proto-Slavic/j...

https://en.wiktionary.org/wiki/Reconstruction:Proto-Slavic/b...

https://en.wiktionary.org/wiki/Reconstruction:Proto-Slavic/g...