Maybe I didn't express clearly, my english is poor. There is a lyric plugin on the foobar2000 that can achieve this effect. It has an option called "Show reference lines", can switch whether to display the secondary lyrics.
Sometimes I just want to read the main lyrics, sometimes I want to see the main lyrics and translated lyrics, my lrc files have main and auxiliary lyrics, I want a button to switch the display. Thank you.
amplified - MR.RAINDROP.lrc