Games like Lexicon Odyssey ~~A Japanese-Learning RPG~~
Games like Lexicon Odyssey ~~A Japanese-Learning RPG~~ include Melvor Idle, Chill Pulse, Chill with You : Lo-Fi Story, Thank Goodness You're Here!, and Chained Together. We matched them by the tags players give Lexicon Odyssey ~~A Japanese-Learning RPG~~ on Steam (Adventure, Casual, JRPG, Education, and Language Learning): closest matches first, and among equally close ones the better-known games.

Melvor Idle
Shared: Casual · Adventure · Idler

Chill Pulse
Shared: Casual · Utilities · Education

Chill with You : Lo-Fi Story
Shared: Casual · Utilities · Adventure

Thank Goodness You're Here!
Shared: Adventure · Casual · 2D Platformer

Chained Together
Shared: Adventure · Casual · Platformer

Cookie Clicker
Shared: Casual · Idler · Indie

Learn Japanese To Survive! Hiragana Battle
Shared: Adventure · Education · JRPG

Laughing to Die
Shared: Adventure · Casual · Platformer

DAVE THE DIVER
Shared: Casual · Adventure · Singleplayer

SANABI
Shared: Adventure · 2D Platformer · Platformer

Celeste
Shared: Platformer · Adventure · 2D Platformer

FEZ
Shared: Platformer · Adventure · Casual

Wagotabi: A Japanese Journey
Shared: Education · Language Learning · JRPG

Scribblenauts Unlimited
Shared: Casual · Adventure · Education

Sonic Origins
Shared: Adventure · Casual · 2D Platformer

Sonic Superstars
Shared: Adventure · Casual · Platformer

Super Fancy Pants Adventure
Shared: Adventure · Casual · Platformer

BEEP
Shared: Adventure · Platformer · Casual

Kao the Kangaroo: Round 2 (2003 re-release)
Shared: Adventure · Casual · Platformer

Pikuniku
Shared: Adventure · Casual · Indie

A Story About My Uncle
Shared: Adventure · Platformer · Casual

Secrets of Grindea
Shared: Adventure · JRPG · Singleplayer

Nihilumbra
Shared: Adventure · Casual · Platformer

Hollow Knight
Shared: Platformer · Adventure · Singleplayer