These are what I gathered from UnitLost's Sombra gameplay stream the game. I don't speak Spanish, so I wasn't able to understand and list down her Spanish lines. Sorry! If you know some lines that aren't here, help me out! :)

edit: added Spanish lines, thanks guys!

edit2: Sombra's out in PTR now and I get to hear her more so more lines have been added.

Spawn

Setup:

“Everything can be hacked… and everyone.”

Hero change to Sombra:

“Sombra online.”

Respawn:

“Didn’t see that coming.”

“Reboot and try again.”

“We all make mistakes.”

"Me agarraste en curva" ~(You caught me off guard)

"Ya estoy lista para ese trago" ~(I'm ready for that drink now)

"No manches" ~(No way.)

Communication Wheel

Hello: "Hey!", "¿Qué onda?", "Hola!" ~(What's up?, Hello!)

Thanks: "Thanks!", "Thank you!", "Gracias!" ~(Thanks.)

Acknowledge: “Got you!”, “I got it.”

Need heeling: “I need healing!”

Group up: “Come over here!”

Ultimate status ready: “My ultimate is ready. Get in there!”

Abilities

Hacking:

“Initiating hack.”

“Let’s get started.”

“Iniciando el hackeo” ~(Initiating hack)

Translocator toss:

“Be right back!”

“Beacon in place.”

"Always leave yourself a back door."

“I might need this later.”

"Ahorita regreso" ~(I'll be back)

Translocator teleport:

“Translocating.”

“See you later!”

"Cheers, love! Hahaha"

Cloaking:

no voicelines

Uncloaking:

“Here I am.”

“Looking for me?”

“Been here all along.”

“Hey there.”

"Missed me?"

“Gotcha.”

"Me extrañaste?" ~(Did you miss me?)

"He vuelto" ~(I'm back)

"¿Qué onda?" ~(What's up?)

"¿Qué tal?" ~(How's it going?)

EMP:

Enemy/Your own: “Apagando las luces!” ~(turning off the lights)

Friendly: “EMP activated!”

Objectives

Pushing payload:

“Payload is on its way.”

"I'm moving the payload."

"Payload moving. Let's make sure someone stays with it."

Payload falling back on attack:

“Someone needs to get the payload moving!”

"The payload's not doing much good sitting there."

Capturing control point:

“I’m securing the objective. Anyone want to join me?”

“Taking the objective. Any help would be appreciated!”

Enemy capturing control point:

"They're taking the objective! We should probably stop that."

Callouts/Others

Elimination:

"Back off!"

“Down for the count!”

"I know Kung Fu!" [when finishing blow is a melee attack]

"Oh, pobrecito!" ~(Oh, poor thing!) [when killing male heroes]

"Oh, pobrecita!" ~(Oh, poor thing!) [when killing female heroes]

Sees a turret:

“Enemy turret.”

On fire:

"I'm on fire!"

“I’m on fire! Touch me, and you’ll get burned.”

Picking up a healthpack:

"Feeling much better."

"Un poco mejor." ~(A little better.)