It's often (certainly not always!) the case that if a language has significant inflectional morphology (conjugation) for expressing person and maybe number of t

It's often (certainly not always!) the case that if a language has significant inflectional morphology (conjugation) for expressing person and maybe number of the subject (and for some languages, the direct and/or indirect object), then you don't need to use the pronouns, unless for emphasis. Spanish and Italian are like that.