The General
The Gold Rush
Sunrise
The Thief of Baghdad
The Crowd
Intolerance
nah in all seriousness there's gazillions of them, would be too hard to come up with a list. Probably 80% or more of my favourite films are non-English-language. Countries like France, Italy, Japan and Russia are long-established cinematic centres and there's also dozens of masterpieces from Korea, China, Scandinavia, Eastern Europe, Africa, South America, etc etc
Top o' my head list
Stalker
Solaris
Au Revoir Les Enfants
Lacombe Lucien
My Life As a Dog
Spirit of the Beehive
A Man Escaped
Pickpocket
La Dolce Vita
8 1/2
Alice in the Cities
Kings of the Road
Wings of Desire
Beau Travail
Holy Motors
The Red and the White
The Round-Up
L'Enfant
Burning
Zama
Aquarius
Neighbouring Sounds
Black Cat White Cat
Valley of the Bees
4 Months, 3 Weeks and 2 Days
Toni Erdmann
Bande a Part
Vivre Sa Vie
Happy as Lazzaro
The 400 Blows
Last Year at Marienbad
Landscape in the Mist
Zero a Conduite
Nobody Knows
Shoplifters
Shadows of Forgotten Ancestors
Together
Distant