I am far from meaning that this is invariably the case, and I could give several exceptional cases of variations (taking the word in the largest sense) which have supervened at an earlier age in the child than in the parent.
Ez dut esan nahi, ezta pentsatu ere, hori horrela gertatzen denik hutsik gabe, eta gurasoarengan baino umearengan goizago agertu diren aldakuntza kasu ezohiko bat baino gehiago aipa nezake hemen, aldakuntza hitza zentzu zabalenean harturik.