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 Wise
The Observant
The Initiated
The Wondrous
The Colorful
The Tenacious
The Perceptive
The Steady
The Agreeable
The Undeterred
The Discerning
The Bold
The Traveled
The Seeker
The Optimistic
The Bearer
The Master