Here is the full list of all 42 Lingo achievements.
The base game contains 26 achievements, and there are 2 DLC packs containing 16 achievements.
The Bold
The Perceptive
The Seeker
The Traveled
The Agreeable
The Tenacious
The Undeterred
The Initiated
The Discerning
The Wise
The Optimistic
The Wondrous
The Steady
The Bearer
The Colorful
The Observant
The Master