If you are having troubles in raising the Speech skill in Skyrim, there’s a glitch that you can do to make it level up to 100.
Note: Doing this glitch might ruin the fun for you.
– Now, to level up that Speech skill, you must head to Riften.
– Go to Black Briar Meadery
– Talk to ‘Ungrient’
– Choose “Tell me About Mavan Black-Briar”
– Choose “Come on, get the truth off your chest” (Persuade)” (Keep on doing this until you get 100 on Speech)
As of this writing, the glitch hasn’t been patched yet. This will only work on consoles.