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