What it means
に言わせれば presents a person or group as the source of an opinion, judgment, or evaluation. It commonly means “if you ask X” or “in X’s opinion,” and can sound like the speaker is deliberately limiting the claim to that person’s perspective. The expression is often used when introducing a potentially subjective assessment, including one that differs from the speaker’s own view.
Usage note
に言わせれば is morphologically the conditional form of the causative 言わせる, but in this construction it conventionally means “according to X” or “if you ask X,” rather than simply “to make someone say.” It normally attaches to a person or group that can hold an opinion, not to an ordinary inanimate source.
How to use it
専門家に言わせれば、この薬は安全です。
According to the expert, this medicine is safe.
私に言わせれば、彼の判断は正しいです。
In my view, his judgment is correct.
専門家に言わせれば、この薬は安全だ。
According to the expert, this medicine is safe.
私に言わせれば、彼の判断は正しい。
In my view, his judgment is correct.