You can use the Localization Dashboard to gather your text for translation. There’s some information about it here, although it’s somewhat out-of-date now: https://forums.unrealengine.com/development-discussion/content-creation/34379-localization-dashboard-preview-and-explanation-of-ue4-s-text-loc…

Text extraction

Development Programming & Scripting Blueprint

Everynone (Everynone) October 26, 2017, 9:46am 3

UE4 has some rudimentary localisation tools:

And here’s some details: