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