Complex sentence: However, the phonology of the consonants and part of the lexicon are in some respects closer to Galician-Portuguese or Catalan than to modern Castilian, partly because they retained characteristics of medieval Ibero-Romance that Castilian later lost.
Split into simpler sentences: However, the phonology of the consonants and part of the lexicon are in some respects closer to Galician-Portuguese or Catalan than to modern Castilian. This is explained not by direct influence but because they retained characteristics of medieval Ibero-Romance that Castilian later lost.