con tal de que

as long as

→ con
phrase Rare #48,447
as long as Introduces a condition that must be met. It is commonly followed by the subjunctive.
SP: Puedes usar mi computadora, con tal de que la cuides.
EN: You can use my computer as long as you take care of it.

Con tal de que llegue hasta el valle.

As long as it reaches the valley.

— Nausicaä del valle del viento (1984)

Podemos seguir jugando, con tal de que no hagamos demasiado ruido.

We can keep playing, as long as we don’t make too much noise.

Te dejo que vayas, con tal de que no vuelvas tarde.

I'll let you go, as long as you don't come back late.

No me importa, con tal de que seas feliz.

I don't mind, as long as you're happy.