UE3 Localization deprecated in UE4?

Hi, just a quick question to be 100 % sure: the UE3 localization system (which uses .INT files) was completely replaced by a new system in UE4 (using .archive and .po files)?

Correct.

You can brush up on the new system by looking at the following documentation:

Some supporting links:
https://docs.unrealengine.com/latest/INT/Programming/UnrealArchitecture/StringHandling/FText/index.html

Thank you!