何かと言うと

なにかというと【何かと言うと】

¶～自分の実家を引き合いに出す

refer to one's parents' family ［the affairs of one's parents' home］ in everything.

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なにかというと【何かと言うと】

on the least pretext; at the drop of a hat.

●祖父は何かと言うと昔はよかったと言う. Grandfather will always find a pretext to tell you how much better things were in the old days.

・あの男は何かと言うと暴力に訴えるので困る. The trouble with him is that he always tries to settle everything by physical force.

・君は何かと言うと子供の自慢をするが, ちょっと見苦しいよ. The way you're always finding occasion to brag about your kid is sometimes hard to take.