The sentence comes from a video about why Japanese language has so many pronouns.
The translation for this from the same video is:
"We can infer that personal pronouns in Japanese differ from those of other languages in that they change very often"
So, what I can't understand is this: 他の言葉からの転用が多い : Seeing the translation, I guess 言葉 means 言語 here, right? so, does it mean something like:
at least that's what I see.