MTL JTM stands for "Montréal, je t'aime" which is the French translation of "Montreal, I Love You".
The best way to experience Montreal is by saying "Je t'aime". More than a souvenir, it is statement that you loved your trip, that you were right to come + it is in French which is the local language. Have the local experience.
The Secret appears when you flip the logo horizontally or in a mirror. MTL JTM then becomes JTM MTL.
This is why we call it "The Reflection of Montreal".