./usr/lib64/python2.7/site-packages/pyphen/dictionaries/ ./usr/lib64/python2.7/site-packages/pyphen/dictionaries/hyph_af.dic ./usr/lib64/python2.7/site-packages/pyphen/dictionaries/hyph_af_ZA.dic ./usr/lib64/python2.7/site-packages/pyphen/dictionaries/hyph_bg.dic ./usr/lib64/python2.7/site-packages/pyphen/dictionaries/hyph_bg_BG.dic ./usr/lib64/python2.7/site-packages/pyphen/dictionaries/hyph_ca.dic ./usr/lib64/python2.7/site-packages/pyphen/dictionaries/hyph_cs.dic ... FWIU, it should work with system dictionaries just fine, so we should look if we can just strip them, or if we need some patching.
A lot of patching is needed in upstream code to facilitate using system dictionaries without having fallback problems. The original (linked) PR was changed to at least be able to set which of pyphen's dictionaries are included.
Updated PR to remove py3.5 and add py3.8, also added test phase and put setuptools in BDEPEND.