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