Weird blue letters when launching the game

First of all , sorry if sometimes my english isn't that good , but i'm french and i am trying to do my best when english writing.
Hello. i am creating this issue cause i got a weird bug when trying to launch minecraft today , and it causes many many lag spikes on the game , i don't know why , but because of this my game is freezing every 2 seconds
Soo , when i launched the game ( i didn't played for months ) i got that screen with blue letters. I can click them , they are links. BUT i can't see the others words under them , i need to highlight them to read :/
And when i am playing , every second i got lag spikes , i can't play , i tried to turn VBO's on to fix it , i searched on the web but i can't find anything. My launcher problem is really linked to this cause i never got any problems when playing minecraft before , i never got lag spikes like that. :/
I will join 2 screenshots to this bug report so you can understand better cause my english isn't that good as you may have seen
Have a good day.