Tool to edit Unreal localisation (.locres) files, supports Windows x86/x64, and Linux x64.
I made this with Payday 3 in mind, because I am already bad at organising and using something like Google Sheets with different versions of the data is.. no.

This tool is best used for en-masse text replacement, or just easier text replacement, as locres mods override other locres/text mods usually. Using UAssetGUI and editing string tables directly may be best for other use cases.

Installation Instructions:
https://github.com/Snoozeds/UnrealLocresEditor?tab=readme-ov-file#installation-instructions-windows-x86x64

This guide may also help you learn the basics of text replacement, this tool might expect you to know some of these things in some areas still:
https://gtaforums.com/topic/977646-gtasade-localization-modding-guide/

payday 3 modding is painful